This is a true Midwest trail race set in the beautiful bluffs, prairies and forests of the driftless region of eastern Iowa amongst the scenic setting of the Mississippi river valley!

Start Time – (100mi/100k) – 8am
Time Limit – 33 hours (5pm Saturday) for the 100mi and 23 hours (7am Saturday) for the 100k
Elevation Gain – ~2,800ft per loop
100mi – 5 Loops = ~14,000ft
100k – 3 Loops = ~8,400ft

COURSE SUMMARY
The 100 mile and 100 kilometer races will follow a marked ~20mi course that starts and finishes in Louis Murphy Park but spends most of its miles in the Mines of Spain Recreation Area on the expansive network of dirt, grass and rock trails that run throughout. Runners will be treated to beautiful views of the Mighty Mississippi River from a number of stunning vantage points, a tour through and around the iconic Horseshoe Bluff as well as panoramic vistas of beautiful grass prairies and dense hardwood forests. The trails range from steep & technical to flat dirt single track to rolling & grassy and everything in between. While there are plenty of hills to challenge you at the Mines, there are also ample stretches of trail where you can really open up and find your stride. This is a truly diverse course that is perfect for your 1st hundred or your 100th hundred!

Upcoming Races

Oct 19 2019
100 KM
8,400 8,400 ft.
Multiple Loop Course
23 :00 Cutoff
Hilly, ~2500-7500 feet in 50 miles
Some rocks, root, and/or ruts
Oct 18 2019
100 Miles
14,000 14,000 ft.
Multiple Loop Course
33 :00 Cutoff
Hilly, ~2500-7500 feet in 50 miles
Some rocks, root, and/or ruts

Results

Date Distance Total Finishers Top Result Top Result (F)
10/20/18 100 KM 62 9:17:47 12:30:57
10/19/18 100 Miles 35 17:45:20 25:15:55
We try to keep the most accurate information about this race, but changes do happen. Always visit the official race website for the most up to date information.
Iron Bull Ultra
  • Oct 5, 2019
  • Wausau, WI
50 KM