When does the F^3 Cap Sauers Trail Marathon & 10 Mile sell out?

F^3 Cap Sauers Trail Marathon & 10 Mile 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.

Marathon

Trail

F^3 Cap Sauers Trail Marathon & 10 Mile

Q: How hard is the F^3 Cap Sauers Trail Marathon & 10 Mile Marathon?

F^3 Cap Sauers Trail Marathon & 10 Mile is a Marathon on a trail course in Palos Hills, 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 F^3 Cap Sauers Trail Marathon & 10 Mile?

Race-day weather in Palos Hills 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 7:30 AM. Check the race-day weather forecast on this page closer to the date for a specific recommendation.

May 9, 2026

Palos Hills, Illinois

Rolling Course

Decision scores

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Best for

Trail / hill challenge

About the Race

Explore the Cap Sauers Holding Nature Preserve - the largest tract of undeveloped land in Cook County, IL. This race will cover every inch of maintained trail within the Nature Preserve. With over 1000 ft of elevation, this marathon is mountainous by Chicago standards! The course uses the Sag Valley Trail system, covering the Yellow, Green, Blue & Tan trails. The whole course is wide horsetrail, allowing for 2-way traffic and encouragement from fellow participants. Results here: https://www.a...

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

Vibe & community

We don't have vibe tags for this race yet — organizers can claim the listing to add them.

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 F^3 Cap Sauers Trail Marathon & 10 Mile 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.