November 14, 2026
There’s a new challenge waiting on the trail.
The Lone Tree Reckoning Trail Heavy 15K & 5K is your chance to trade pavement for dirt, take in the scenery, and find out what the trail has in store for you.
Don’t let the views fool you—this course has some personality. Expect a mix of runnable stretches, climbs, changing terrain, and sections that will make you work for that finish. Whether you’re taking on the Trail Heavy 15K or the 5K, this is a race built for runners who are ready for a little adventure.
Why 15K Instead of a Half Marathon?
We originally planned to include another area of the ranch to bring the course up to half marathon distance. That section isn’t going to work as we’d hoped this year, so the inaugural Lone Tree Reckoning will use the loop we have: just over 15K.
We know some runners were looking forward to a half marathon, and we’re sorry for the change. This loop still brings the climbs, technical terrain, and variety we wanted for the first Lone Tree Reckoning. We’re excited for you to experience it.
Trail 15K
Just over 15K of ranch trails, climbs, and technical terrain, with some faster stretches along the way. It’s a course that will challenge you, whether you run the whole way or hike the sections that call for it.
Trail 15K Time Limit: 4½ Hours (Starts at 7:30am)
That allows roughly 29 minutes per mile based on a 15K distance. Since the loop is just over 15K, the exact pace will be a little faster. The course is hike-friendly, but participants should be prepared to keep moving steadily throughout the race.
Trail 5K
Want a taste of the Reckoning without committing to the half? The Trail 5K brings its own dose of dirt, scenery, and challenge in a shorter distance. It’s a great option for newer trail runners or anyone looking for a fun fall trail race. (Starts at 9am)
Come ready to run. Come ready to hike when you need to. Come ready to earn that finish.
The trail is waiting. Are you ready for the Reckoning?
Awards
🏆 Overall Awards
Awards are planned for the Top 5 Male and Top 5 Female finishers in each distance.
Award breakdowns may be adjusted based on final registration numbers. Any changes to award categories will be announced prior to race day.
15K
Top 5 Male
Top 5 Female
5K
Top 5 Male
Top 5 Female
Lone Tree Reckoning 15K & 5K — Q&A
Why did the Half Marathon change to a 15K?
As we continued working on and finalizing the course, we made the decision to change the longer distance from a Half Marathon to a 15K. This allows us to give runners a challenging, fun and well-supported trail experience while using the sections of the property we feel make the best course.
And don't worry—the Lone Tree Reckoning 15K still earns its name!
Is this a trail race?
Yes! Both the 15K and 5K take place on trails on private property. Expect natural terrain, elevation changes, climbs, fast runnable stretches and some sections that will make you work a little harder.
How difficult is the 15K?
This isn't your typical road 15K. The course includes a mix of terrain—from flatter, faster meadow sections to climbs and more rugged trail. You'll get opportunities to open up your stride, recover and then tackle the next challenge.
What is the time limit for the 15K?
The 15K has a 4½-hour time limit. We want runners to enjoy the experience and tackle the course at a pace that works for them while continuing to make forward progress.
Can I hike/walk the 15K?
Yes! Hiking is absolutely part of trail running, especially on the climbs. Run when you can, hike when you need to and keep moving toward that finish line. Participants must complete the course within the 4½-hour cutoff.
Is the 5K good for newer trail runners?
Yes! The 5K is a great way to experience the Lone Tree Reckoning without taking on the full 15K. It's still a trail race, so expect uneven terrain and some challenge, but it's a great option for runners wanting a shorter adventure.
What swag do participants receive?
We've got some great Lone Tree Reckoning swag!
15K: Dry bag + hat
5K: Hat
Do I need trail shoes?
Trail shoes are recommended but not required. Shoes with good traction are strongly encouraged because you'll be running on natural and uneven terrain.
Are headphones allowed?
No. Headphones are not allowed during the race. Runners need to be able to hear other participants, volunteers, course instructions and what's happening around them on the trail.
Are dogs allowed?
No. Dogs are not allowed on the property. This applies to both participants and spectators.
Are bikes or strollers allowed?
No. Bikes and strollers are not allowed on the property or course.
Are there aid stations?
Yes. Final aid station locations and details about what will be available will be provided as race day gets closer.
What happens if there is bad weather?
It's November in Colorado, so be prepared for changing conditions! We will monitor the weather and trail conditions leading up to race day. Any important updates will be communicated to registered participants.
What should I bring?
Come prepared for November trail conditions and dress in layers. We also recommend that 15K participants carry any additional hydration or nutrition they may want between aid stations.
When will final race-day details be available?
Registered participants will receive final race-day information before the event, including parking, packet pickup, course information, aid stations and other important instructions.
Still have questions?
Reach out to Sweetheart City Racing and we'll be happy to help.
The distance may have changed. The Reckoning hasn't.
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