The Prairie Burn 100 will take place on Saturday, June 6, 2026, in Grinnell, Iowa. This annual gravel bike ride offers routes of 100 km, 50 km, and 25 km, plus a 5 km and 3 km fun run. The event is fueled by Grinnell State Bank and includes a beverage garden, live music, food trucks, yoga in the park, a farmers market, and family‑friendly art activities.
Event Type
Distances
Start Time (assumed)
Terrain
Notes
Gravel Bike Ride
100 km, 50 km, 25 km
To be confirmed
Gravel roads, with hard surface rain reroutes
Helmets required; e‑bikes welcome but not eligible for awards
Fun Run
5 km, 3 km
To be confirmed
Road, paved trail, gravel trail
All ages welcome; under 8 must be with adult; strollers and leashed dogs allowed
All participants must follow event rules. Helmets are required for all bike riders. Obey all traffic laws — the course is open to vehicle traffic. Riders must know how to fix a flat or ride with someone who does, carry a cell phone, and have a bailout plan. Official timing ends at 3:30 PM; bailout support ends at 5:00 PM. E‑bikes are welcome but not eligible for awards. No littering; be discreet with nature breaks. The event runs rain or shine (fun run may become a mud run).
Aid stations: at 10 miles (with van bailout option), 25 miles (Central Park), 35 miles, 50 miles (Central Park), and a roving aid station at 75 miles.
Burner Challenge Segments: two segment challenges located on the first and second 25 miles. Participants must use Strava to record times. Winners (male, female, non‑binary) receive $50 each. Verification at 3:00 PM.
100 Mile Challenge Cup results verified by PB100 Race Director Committee.
Fun run course is clearly marked; volunteers stationed along the route. Start/finish line is shared with cyclists. Runners stay in the designated chute on the RIGHT side of Park Street (cyclists on the left).
Family activities: Yoga in the Park (8:30–9:30 AM, all ages, free), Farmer's Market (9:30 AM–12:00 PM), Storytime Art in the Park (10:30 AM–12:00 PM, free hands‑on art and literacy activities, no registration required).
Beverage garden by Old Fashioned Spirits (11:00 AM–3:00 PM) offering beer and wine. Food by Grinnell College Catering. Live music by Ruari Brownell and band (11:30 AM–2:30 PM) in Central Park. A restaurant guide for Grinnell is available for download.
Contact: [email protected]. Race Director: Jennifer Cogley (641‑990‑0216) for assistance during the race.
Routes: 25 km, 50 km, and 100 km gravel rides. All routes will be available as Ride With GPS files, and route maps at signup. 25 and 50 mile route turns marked with arrows.
Annual results: 2024 and 2025 results available online.
No specific cutoff per distance beyond overall timing ends at 3:30 PM.
Registration and email sign‑up available via the event website.
The Prairie Burn 100 in Grinnell, Iowa on June 6, 2026, features gravel bike rides of 25 km, 50 km, and 100 km, plus a 5 km/3 km fun run, with aid stations, Strava segment challenges, family activities, yoga, farmers market, art activities, beverage garden, food trucks, and live music.
Races Offered
100K
Jun 06, 2026
straighten
Distance —
100K
terrain
Type —
Cycling,
Running
timer
08:00
sell
$60.00
50K
Jun 06, 2026
straighten
Distance —
50K
terrain
Type —
Cycling,
Running
timer
09:00
sell
$60.00
25K
Jun 06, 2026
straighten
Distance —
40.2K
terrain
Type —
Cycling,
Running
timer
09:30
sell
$60.00
3K Fun Run
Jun 06, 2026
straighten
Distance —
3K
terrain
Type —
Cycling,
Running
timer
10:00
sell
$15.00
5K Fun Run
Jun 06, 2026
straighten
Distance —
5K
terrain
Type —
Cycling,
Running
timer
10:00
sell
$15.00
Weather History
These values represent the 3-year monthly averages for June in Grinnell.
thermostatTemperature
17.7° / 27.7°
wb_sunnyFeels like
16.8° / 27.4°
light_mode
Avg sunshine hours
11h 55m
water_drop
Avg rainfall
4.4 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
13.4 km/h (Gentle breeze)
opacity
Sweat loss rate
High
terrain
Course conditions
Hard and dry surface
sunny
Max UV Index
Very High (8.0)
humidity_mid
Humidity
67.3%
wb_twilight
Sunrise
05:36
nightlight
Sunset
20:45
About Grinnell
Learn more about the host city, Grinnell.
Grinnell is a town of almost 10,000 people (2020) in Central Iowa, home to Grinnell College.
