
From the Organizer
John Bryan State Park Arboretum Half Marathon & Loop Challenge
Join us at the scenic John Bryan State Park Arboretum in Yellow Springs, Ohio for a unique loop-style running event designed for all fitness levels. The course is a 1.1-mile scenic loop, allowing runners to choose their distance and build their race one loop at a time in a highly supported environment.
Distance Options:
1.1 Mile Fun Loop – great for beginners, walkers, and families
3.3 Miles (3 loops) – short distance challenge
6.6 Miles (6 loops) – mid-distance endurance
9.9 Miles (9 loops) – advanced training distance
13.2 Miles (12 loops) – Half Marathon distance
Course Features & Support:
🚰 Water & aid station available every 1.1 miles (each loop)
🚻 Park restroom facilities (park potties) available on-site
🎽 Clear, easy-to-follow loop course design
👏 Frequent spectator support and encouraging atmosphere
🧭 Safe, controlled, and consistent race environment
This looped format keeps runners engaged and supported with frequent access to hydration and facilities, making it ideal for pacing consistency, beginners building confidence, and experienced runners chasing personal records.
Set in the natural beauty of John Bryan State Park, this event blends endurance racing with a welcoming community atmosphere where every loop brings you closer to your goal.
Events
Weather
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
86°
Typical Low
62°
Chance of Rain
32%
Based on US Climate Normals data from New Carlisle, 12 mi from the venue.
Host City
Population
3,655
as of 2023
Elevation
1,012 ft
Nearest Airport
DAY
James M. Cox Dayton International Airport · 19 mi
Major Hub
CMH
John Glenn Columbus International Airport · 55 mi
Time Zone
Eastern Time
From Endurance Grid
A small town race. Lodging near the start could be limited, so book early.
Race Location
Your Next Start Line
Every finish line starts with a single decision. Claim your spot at John Bryan Arboretum Trail Half Marathon & Challenge, put it on the calendar, and turn “someday” into a start date.
47
Days to train
Coming Up
ORRRC Summer Solstice Trail Run
Less than a mile away
MVOC Sturgeon Moon Hydrant Hunt
Less than a mile away
Cedar Fest 5k
6 miles away
The Run For Your Life 5k/10k Series- The Outbreak
7 miles away
From Endurance Grid
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
The half marathon is the distance where you find out what you're actually made of. Long enough to demand real preparation. Short enough that it doesn't consume your life to train for it. Most people who run their first half describe it as the race that changed their relationship with what they're capable of. Once you cross this finish line, the bar moves. That's not a warning — that's the point.
Race day energy varies by event size, but the finish line feeling is the same regardless. Big races keep the noise going the whole way. Smaller races give you stretches where it's just you and the miles — and that solitude becomes its own kind of fuel.
The half marathon rewards people who show up for the boring training miles.
How long to train: 10–14 weeks. If you're already running consistently, 10 weeks of structured buildup is enough. If you're building from a casual base, give yourself 14.
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Frequently Asked Questions (FAQs)
John Bryan Arboretum Trail Half Marathon & Challenge
Jul 25, 2026