By: Greg Koch
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Merry Christmas! On this special day, my final 5K guest was the most important person in my life—my bride, Chelsea Koch.

Throughout the years, Chelsea has had one clear rule for me and my involvement at 605 Running Company—I have to love my job. As a healthcare professional who trains people from around the world, Chelsea is a big deal. Many folks don’t realize just how vital she is to making 605 Running Company function. She is my rock.

When I’m stressed, tired, over-extended, or downright grumpy, Chelsea is the one who lifts me up, makes me smile, and supports me in ways no one else can. This year has been incredibly challenging for our family. Purchasing the store wasn’t something we had planned, and so much of our success now depends on our community supporting us.

For our 5K, we set up her walking pad next to our treadmill in our make-shift basement workout room. We dropped Violet off with her parents and spent 45 minutes walking side-by-side, making plans for the future, watching YouTube vlogs, and simply enjoying each other’s company. It was the perfect Christmas gift—time together. Chelsea, I’m so thankful for you and everything you do. You truly make a huge difference at 605 Running Company. Thank you for allowing me to love my job.

Chelsea’s 12 Days of 5Ks Q&A
Holiday Reflections:
The holidays mean family time. This year is extra special as my sister is moving to Sioux Falls after more than a decade in Iowa City. We’re excited for new traditions, more time together, and lots of Lefse and love.
Connection to 605 Running Company:
I never imagined myself as a runner. I grew up with asthma and didn’t consider running an option. But thanks to the store, I learned about proper shoes, technical fabrics, and the benefits of running socks. 605 opened up a world I never knew existed. As Portlandia says, “Gotta get the gear!”
Favorite Running Memories:
My favorite memory is finding the lost U-Haul keys during the 2021 Skedaddle and seeing Greg’s relief. My favorite adventure was the Wheels Off Half Marathon in Duluth. The pitch-black start line, thunderstorms mid-race, and a countertop finisher medal we still use as a cutting board made it a quirky, unforgettable experience.
Running Goals for 2025:
I haven’t run since 2018, but I’m considering a Disney race or a 10K. For now, I enjoy walking and working at 605 events (where Greg knows I’m the boss!).
Looking Ahead to 2025:
I’m excited for a family vacation to Disney World!
Staying Active in Winter:
I love my walking pad and treadmill for indoor miles while watching YouTube vlogs. I’m extra cautious about ice and have learned to layer well for outdoor walks.
Community Message:
Please shop local year-round. I’m so proud of Greg and what we’ve built. Raising our daughter in this community means the world to us, especially with so much of our family here. We couldn’t imagine being anywhere else.

From our family to yours—Merry Christmas and Happy Holidays! Thank you for supporting 605 Running Company and for being part of our journey.

By: Greg Koch

You might recognize today's guest as the Mayor of Sioux Falls, but to me Paul TenHaken is a long-time friend. I probably first met Paul when I was waiting tables at The Cookie Jar and he was working downtown and volunteering with what was then known as Mainstreet Sioux Falls (now Downtown Sioux Falls, Inc.) on a marketing committee. Over the years, as our lives and careers have evolved, we've stayed connected. My wife jokingly refers to him as my "Mayor Bro". Paul has become a great friend—someone I can count on. Whether it’s MCing the Skedaddle in freezing rain, participating in this blog series, or cheering on my family and our businesses for over 15 years, directly or indirectly he’s been there. What makes that even cooler is that so many others in our community could tell a similar story about Paul. He’s the kind of guy who shows up, supports others, and leads by example. That’s the heart of servant leadership.

Three years ago, almost to the date, Paul invited me and a few others to his office to share an idea he had about connecting physical and mental wellness. He wanted to run across South Dakota. But more importantly, he wanted the effort to make a real impact. That idea became the 437 Project—I’ve even had the chance to run with a few alumni from the project over the past 12 days. In three years, the project has raised a staggering amount for The Helpline Center. It is easily a career highlight and has helped me speak more openly during this series about mental health.

So when I reached out to Paul about joining the 12 Days of 5Ks, he didn’t just want to go for a run. He suggested turning it into a mini-reunion of 437 runners and volunteers on Christmas Eve. It was a beautiful thing. But that’s Paul. He champions health and wellness in every way. One of his other big initiatives, the annual 100 Miles in 100 Days Challenge, has brought our community together through movement like never before. It’s impressive to see a leader put so much time and energy into encouraging people to be active. We’ve even seen new runners and walkers come into our shop because of it. When someone prioritizes health and wellness the way Paul does, I’m all in. I don’t know what’s next for him when his current role ends, but one thing I've learned about Paul for sure—his passion for promoting mental and physical health will always be part of the plan.

Q&A with Paul
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Holiday Reflections
The holiday season is a time of gratitude, reflection, and connection. For me, it’s about reflecting on the birth of Christ and that special gift, celebrating the year’s accomplishments, and setting intentions for the future. I celebrate by taking a step back from the busyness of life, appreciating the small joys, and often sneaking in some winter runs to embrace the crisp, peaceful air of the season.
Connection to 605 Running Company
605 Running Company has been a great community partner and I've made several friends in the process. It has created a welcoming, supportive community of runners that didn’t exist before in our area. It’s incredible to see people of all ages and abilities coming together to share their passion for running. For someone like me, who only discovered running after college, the connections and camaraderie fostered by 605 Running Company have deepened my love for the sport and strengthened my ties to the city.
Favorite Running Memories
One of my favorite memories with 605 Running Company is seeing how they've helped the city come alive during the 100 Miles 100 Days Challenge. It’s an initiative I’m proud of because it gets people moving, fosters community spirit, and showcases the joy of running. My favorite running adventures of all time, though, are the many Spartan races I have done. I love the mix of strength and endurance that those events provide.
Personal Running Goals
Looking ahead to 2025, I’m considering tackling my first official marathon. Although I’ve done the marathon leg in IRONMAN, this would be my first standalone marathon. I'll also hit up a few Spartan races and maybe a shorter triathlon.
Upcoming News
In 2025, I’m eager to see how the running community continues to grow and evolve. Whether it’s through events, challenges, or new opportunities organized by 605 Running Company, I believe there’s so much potential to inspire and connect even more people through running. I look forward to supporting initiatives in the community that build on this like the 100 Miles 100 Days Challenge.
Holiday Inspiration
Running during the winter months can be a challenge, but it’s also incredibly rewarding. What keeps me going is the reminder that every step I take, even in the cold, is a step toward my goals. Dressing appropriately, embracing the beauty of winter landscapes, and running with a group for accountability make it easier. My advice? Find joy in the process, no matter the weather, and remember why you started.
Community Appreciation
To the 605 Running Company community: thank you for being a part of something truly special. This season reminds us of the importance of giving, and your enthusiasm, encouragement, and camaraderie are the greatest gifts. Keep inspiring each other, and let’s make 2025 a year to remember for running and community. Happy holidays, and see you on the trails!

By: Greg Koch
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You will not find another individual who has had a larger impact on the Sioux Falls running events scene than my guest for the 12 Days of 5Ks, Karen Lechtenberg. Naturally, we met up for a trail run—fitting for someone who has helped pioneer trail running in our community. As we navigated the Big Sioux Recreation Area, we discussed everything from raising kids (she has four boys), hosting events, and timing races to building relationships and managing life's challenges.

Karen spoke glowingly about her kids and their dedication to sports, school, and life. "I'm so amazed by their dedication," she said. I took the opportunity to remind Karen of her own personal success in sports. I honestly cannot recall a time when she wasn’t committed to the gym or the trails. Karen is simply put—a badass. She’s a swim instructor, an ultra-marathoner, a bike racer, a race director, a boy mom, and, on top of all that, a full-time middle school teacher. To me, it’s no surprise that she’s raising incredible kids.

One of Karen’s greatest superpowers is being approachable. She has a heart of gold and has created events that stand the test of time. I’ve been fortunate enough to earn a Betty the Yeti award, a Kitchen Spoon trophy, and several custom-made bowls—if you know, you know! Karen’s passion for running and the community shines through in all she does.

This year marks a bittersweet milestone for Karen. Her final event will also be her first—Chilly Cheeks. Unlike other races she has passed on to new directors, Karen is content letting her legacy stand with this event. It’s poetic beauty, and I plan on rallying our community to make it the perfect sendoff for her. Stay tuned for more details!

I could gush endlessly about this amazing human. Karen gently guided me into race directing, supported our store tirelessly, and connected me with Anderson Race Management to help address the event timing crisis facing our region post pandemic. As we near the end of the 12 Days of 5Ks, I knew Karen had to be one of my final runs. People like Karen make our running ecosystem thrive, and I’m so thankful to have had her in my corner for the past decade. With her youngest boys "the twins" heading off to college, I can’t wait to see where the sport takes her next and how she continues to cheer on her favorite athletes. Thank you, Karen, for everything!

Karen’s Reflections
Holiday Reflections:
The holidays are all about family to me. When I was little, we spent the break baking cookies, decorating the house, watching movies, and spending quality time together. Now, we’ve moved away from traditional gifts and focus more on experiences. We have fun activities planned every day, and “No Rules Day” is everyone’s favorite—we eat whatever we want and do whatever we want, showers optional!
Connection to 605 Running Company:
I feel like I’ve been with 605 since the beginning—partnering with them for packet pickups, shopping, and group runs. Life is busy chasing kids now, but as empty nesting approaches, you just might see me back at group runs again.
Favorite Running Memories:
One favorite memory was hosting a Pie Day run with Pearl Izumi, where my 6-year-old accidentally ran 5 miles with Chris Anderson! I also love the trail sisters and Kiwanis gang—whether we’re camping, racing, or spending hours running in circles at Good Earth Farm.
Personal Running Goals for 2025:
I’m coming back from an injury and plan to pace a friend at the Black Hills and do the 36-hour at Blood Run. I’ll also sprinkle in some gravel bike races and continue with CrossFit for cross-training.
Upcoming News for 2025:
After 13 years, I’m stepping away from race directing. Chilly Cheeks on April 5, 2025, will be my last race. It’s bittersweet, but it feels right to end where I began.
Holiday Inspiration:
Running with friends keeps me motivated—and making sure my pants fit! I stick to my Tuesday night Kiwanis Hills runs and hit the trails on weekends.
Community Appreciation:
Stay active! Stay connected! And be nice to others!

By: Greg Koch

Today, I had the privilege of meeting Alex Pool and running the world-famous pickle route. A loop around Yankton Trail Park from Farm Field. Simply put, we need more men like Alex.

Alex’s journey is inspiring. After finishing high school, he described himself as pretty smart but unsure of what he wanted to do. So, he made the decision to serve his country, leading to a five-year stint in the Marines as a videographer. He was stationed in San Diego and Okinawa, serving our country through the lens of a camera.

When his service ended, Alex still wasn’t sure what direction to take, but his next step led him to Dakota State University to study cybersecurity. He’s an incredibly smart guy, but he’s far from your stereotypical IT professional. Alex is a community builder—someone who thrives on connection, humor, and impact.

I first met Alex at a group run. He was quiet at first but slowly came out of his shell. That’s when I learned he worked at the Helpline Center. Around this time, I was helping launch what would become The 437 Project—a run across South Dakota for mental health awareness and suicide prevention. When we discussed potential runners for our inaugural journey, Alex immediately came to mind. 

When I asked Alex why he chose to work at the Helpline Center, his answer reflected his character: it was a place where he could use his technical skills while continuing to serve his community. Alex is a living example of service to others. Watching him grow into such an impactful member of our community has been a privilege, and he’s certainly someone you should know.

Q&A with Alex Pool
Holiday Reflections
For me, the holiday season is about rekindling connections. Whether it’s with the local community through volunteer opportunities, strengthening bonds with family and friends, or reflecting inward to set goals for the next year, it’s a time for connection and growth.

Connection to 605 Running Company
605 Running Company introduced me to the social aspect of running. I participated in some of my first races at their events back in 2019. The group runs helped me make new friends and deepen my love for the sport. Without 605, I’d still be running solo and wouldn’t have found my passion for pushing myself and improving as a runner.

Favorite Running Memories
One of my favorite memories is the Trick or Treat Trail Race around Halloween. Last year, I ran the 10K dressed as a wizard—robe, beard, staff, and all—and managed to finish first! My overall highlight has been participating in The 437 Project as a runner in 2022 and 2023. It’s been an incredible way to connect with others while supporting mental health initiatives.

Personal Running Goals
In 2025, I want to become a better all-around runner. My main goal is to complete a marathon in under three hours—I’ve got about five minutes to shave off to get there.

Holiday Inspiration
Winter running is tough—the preparation alone can kill motivation. But once I’m out there, I always enjoy it. Running at night offers a fresh perspective on familiar areas, and it’s fun spotting wildlife, including ditch cats 🐈 along the bike trails with my headlamp.

Community Appreciation
A big 'Thank you!' to the 605 Running Company community! Being part of this group has enhanced my life in so many ways and pushes me to be the best runner and person I can be. ❤️

By: Greg Koch
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Today’s 5K took me on a quick field trip to Mankato. Making friends as an adult is really difficult. Between kids, work, and responsibilities, building friendships outside your immediate bubble often falls to the back burner. That’s why I’m especially proud to have Dr. Ben Kohls as a friend. We’ve worked hard to maintain our friendship as life has twisted and turned—and it’s been so worth it.

When 605 first started, we had a Saturday group run. On many of those mornings it was just two guys named Ryan, Ben, and me. The Ryans’ wives got along really well, so they naturally had a connection. That left Ben and me to chat as we tackled 4–10 miles every Saturday. It started out that simple—we’d run, chat, and go about our week. Over time, we learned more about each other, exchanged phone numbers, introduced families, and became close friends.

Ben and I have run all over the country together. Correction—Ben has run all over the country, and I’ve left a trail of blood trying to keep up. We ran the LA Marathon—Ben smiled and cruised; I’m still looking for parts of my soul. In Arizona, Ben climbed rocky desert landscapes like a mountain goat while I fell and busted my hands and knees open. I even paced Ben at the Black Hills 100—he ran 100 miles, and I fell into poison ivy. Running is our way of spending quality time together.

Ben is the Director of Graduate Studies in Clinical Mental Health Counseling at Bethany Lutheran College and an incredible man of faith. Whenever I face a challenge, need someone to bounce ideas off of, or just need a listener, Ben is there. I never had a brother, but if I did, I’d want him to be Ben. I’ve even joked that I’m the Kohls’ seventh child—especially when I dropped my stuff on their floor today, and his daughter said, “You do that just like Malachi!” (Malachi is their oldest.)

Including Ben in my 12 Days of 5Ks was important. He’s given me so much guidance, been a role model, and shared some of the highest highs and lowest lows our sport has to offer. Ben once ran 88 miles on basically one leg before being pulled from a race due to cutoff time. That’s the kind of determination and grit he has.

Good friends are worth driving a few hours to run 3 miles with. I’m so thankful for this journey.

Ben’s Responses to the 12 Days of 5Ks Questions
Holiday Reflections
We love Christmas in our home. It truly revolves around faith and family. It begins when we go to a local farm and cut our Christmas tree. This involves our immediate family and the nieces and nephews that visit during Thanksgiving. Everyone helps decorate inside and outside. Advent meals and services with our church community and singing in the choir are anchor points throughout the month of December as we prepare to celebrate the birth of the Savior. The time we spend together this time of year, whether at home, visiting family, or making new memories, is always special and a treasured gift.

Connection to 605 Running Company
Running was an uncomfortable means to an end for me in athletics, but that truly shifted when I found 605. I started coming to group runs after visiting the store soon after it opened its doors 10 years ago. I didn’t know it at the time, but the group runs at 605 would completely change my running journey. Through the wonderful people I became friends with, I learned about trail running and ultra distance events. I began running at Good Earth when it was just a gravel parking lot and found peace and satisfaction on these trails. The friendships that have been formed through the 605 community are some of the most meaningful in my life. Sharing countless miles filled with joys, pains, defeats, and victories continues to be a tremendous privilege. 
Favorite Running Memories
So. Many. Memories. I couldn’t choose a favorite, because it is the accumulation of all the small and big moments that have formed what 605 means to me. From the early morning runs from the store, where I would lay on the couch until the very last moment, to the arctic runs in the snow and subzero temps with the OG frosty beard pics, to the many miles of racing, pacing, and crewing at the Black Hills 100 events; all of these are made meaningful because of the people I shared them with.
Personal Running Goals
I am excited for Black Hills this year. After completing the Man in Black back in 2022, I thought I was done running the event. However, I was back in 2023 to crew and pace my good friend, Jeremy, in his 100 mile debut. Then I was back in 2024 where I ran the 30k with my beautiful and amazing wife, Sarah. In 2025, I will be back again, running the 30k with my son, Titus! I also entered the lottery for a summer 100 mile race, so we will see what happens with that.

Winter Running Tips
Find a partner or group to run with. I have been the most consistent with running through the winter when I have others to run with. Plan out your post-cold run snacks and beverages. Having something warm and delicious waiting for you at the end of a winter run is a must - coffee and a bagel sandwich are my favorites after a cold morning long run. Wear the right clothing. Having good layers and flexibility to adjust during the run makes winter running safe and enjoyable. A buff is a must for all conditions and is the Swiss army knife of running gear. A beard helps too!

Community Message
I am simply grateful for Greg and the whole 605 community. Even though I live a couple hours from Sioux Falls these days, I still feel a tremendous sense of connection to this community and consider the 605 my running home.