When does the Ondessonk Trail Races sell out?

Ondessonk Trail Races hasn't published a hard registration deadline. Most races of this size raise the entry fee in tiers (early-bird, regular, late) and can sell out without warning — sign up early if you're committed.

Half Marathon

Trail

Ondessonk Trail Races

Q: How hard is the Ondessonk Trail Races Half Marathon?

Ondessonk Trail Races is a Half Marathon on a trail course in Ozark, Illinois. We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.

Q: What should I wear for the Ondessonk Trail Races?

Race-day weather in Ozark can swing year over year, so dress for the forecast on the day. As a rule of thumb, dress for ~10°F warmer than the standing temperature once you start running. Layer with a throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, and a singlet plus a visor when it climbs above 60°F. The published start time is 8:00 AM. Check the race-day weather forecast on this page closer to the date for a specific recommendation.

April 11, 2026

Ozark, Illinois

Rolling Course

Decision scores

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Best for

Family-friendly

Trail / hill challenge

About the Race

Join us at Camp Ondessonk for our 16th Annual Ondessonk Trail Races! With two NEW races this year - a half marathon through the beautiful spring wildflowers, and a one-mile fun run that is perfect for families to enjoy the beautiful scenery! One Mile Fun Run: Families can enjoy a run around our beautiful Lake Echon. All ages welcome. Date: April 11, 2026 Start Time: 10:00 AM Pricing: $20 Includes: T-shirt** Those who register after March 18 are not guaranteed their requested shirt size. 5k Ru...

Course Profile

Course profile data unavailable for this race.

Course features

Terrain

trail

Surface

Trail

Elevation gain

Not measured

Course type

Not stated

Field size

Unknown

Boston qualifier

Course map

Not yet published

Elevation profile

Not measured

Accessibility & inclusion

Walker-friendly

Stroller-friendly

Dog-friendly

Kids race

Yes

Vibe & community

scenic

No charity partner listed.

History & past results

Years running

Unknown — claim to add

Recurrence

Annual (assumed)

Past finisher times and year-over-year participation will appear here once the organizer publishes them.

Reviews

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Common questions

How hard is the Ondessonk Trail Races Half Marathon?

We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.

What should I wear?

Dress for ~10°F warmer than the standing temperature once you start running. Throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, singlet plus visor when it climbs above 60°F. The race-day forecast above is the source of truth closer to the date.