About
Welcome to the Loud Thunder 50, hosted by Sun Trail Running! Experience the rugged and picturesque trails at Loud Thunder Forest Preserve along the mighty Mississippi River with our 50-mile and 50K events. These races promise a challenging yet rewarding adventure amid breathtaking scenery. We aim to create a laid-back trail running environment, highlighting the exceptional features of the park while maintaining low costs and a focus on runners and trails. The event is headquartered at the Horse Corral Campground, with camping options available onsite and throughout the park. A key highlight is a campground located near the Riverview aid station, right along the race course. By joining us, you contribute to the park's future conservation efforts, enjoy custom racer gear, and partake in exclusive post-race amenities. Whether you're running or camping, immerse yourself in the vibrant outdoor community Loud Thunder offers.
Races
50K
Apr 17, 2027 (Sat) - 08:00
Distance
50 km
Terrain
Trail
Course
Multiple loops
Elevation gain
4,000 ft
Elevation loss
4,000 ft
Difficulty
Beginner
Cutoff time
12h
Course record (M)
3:24:08
Course record (F)
4:27:41
Entry fee
$85
50mi
Apr 17, 2027 (Sat) - 06:00
Distance
50 mi
Terrain
Trail
Course
Multiple loops
Elevation gain
6,600 ft
Elevation loss
6,600 ft
Difficulty
Intermediate
Cutoff time
14h
Course record (M)
7:14:41
Course record (F)
8:07:16
Entry fee
$100
Weather history
Temperature
42°F / 61°F
Feels like
35°F / 56°F
Avg sunshine hours
9h 6m
Avg rainfall
0.12 in
Avg snowfall
-
Max wind speed
14.7 mph (Moderate breeze)
Sweat loss rate
Moderate
Trail conditions
Mostly tacky, some mud



