Colesburg Back 40

August 31 2025

Colesburg IA

Unconfirmed

Distances: 25, 40, 60, 100, 200 miles

Difficulty: Ultra Distance and Climbing for events well over 100 miles

Limited to: 1000 Participants

The Colesburg Back 40 is the oldest ongoing gravel race in the Midwest. 2024 will be 31 years. The race takes place in Iowa's driftless region and has views that'll take your breath away.

5 different routes are available this year. 25-45-60-Iowa’s Hardest 100-Iowa’s Hardest 200. Yes all routes include level B & C roads. Remember, the Level C roads are private property and are NOT allowed to be ridden , except for race day.

Count on roughly 1,000 ft of climb per 10 miles but you won't notice that, you'll be so busy enjoying the landscaping.

Because of the history of this race and close ties to the Chequomegan 40, we have our own Pirate Hill

What you get: Aid stations, marked routes, awards ceremony, 3 podium spots for each category, hand crafted awards, Iowa’s largest prize table, food from our local 4H group, music, and to hang out with your favorite race director!

What we get: to do all the work, enjoy your presence and smiles, and to donate all the proceeds back to the community.

And lastly: Bring your legs!!

Colesburg Back 40