USARunningTrail100K · 100 km / 62.1 mi100mi · 160.9 km / 100.0 mi10K · 10 km / 6.2 mi140mi · 225.3 km / 140.0 mi20mi · 32.2 km / 20.0 mi

Hell Creek 100

Sylvan Grove, Kansas, Switchgrass Trailhead, Hell Creek area, Wilson State Park · USA

Next race day

Fri, 30 Oct 2026

10:00 CDT

Race website Official entry Calendar

About Hell Creek 100

Hell Creek 100 is a running event in Sylvan Grove, Kansas, Switchgrass Trailhead, Hell Creek area, Wilson State Park, United States. Recorded disciplines include 100K, 100mi, 10K, 140mi, 20mi. The listed surface is trail. The listed organiser is Ultraverse Supplements. The next listed date is 30 October 2026. Check the organiser's information for entry and race-day arrangements.

Dates, starts & entry

Times are local to the race. Select the entry route for your distance.

140mi · 225.3 km / 140.0 mi
Fri, 30 Oct 2026
Starts 10:00 CDT
Entries open
Official entry
Advertised trail distance. Start and finish beside the Switchgrass restroom parking lot.
Edition source
10K · 10 km / 6.2 mi
Sat, 31 Oct 2026
Starts 07:30 CDT
Entries open
Official entry
Advertised trail distance. Start and finish beside the Switchgrass restroom parking lot.
Edition source
20mi · 32.2 km / 20.0 mi
Sat, 31 Oct 2026
Starts 07:30 CDT
Entries open
Official entry
Advertised trail distance. Start and finish beside the Switchgrass restroom parking lot.
Edition source
100K · 100 km / 62.1 mi
Sat, 31 Oct 2026
Starts 06:30 CDT
Entries open
Official entry
Advertised trail distance. Start and finish beside the Switchgrass restroom parking lot. The organiser describes the nominal 100K as three approximately 20-mile loops.
Edition source
100mi · 160.9 km / 100.0 mi
Sat, 31 Oct 2026
Starts 06:00 CDT
Entries open
Official entry
Advertised trail distance. Start and finish beside the Switchgrass restroom parking lot.
Edition source

Location & race day

Listed venue / area

Switchgrass Trailhead, Hell Creek area, Wilson State Park, Sylvan Grove, KansasUSA

Find this location on a map

Confirm the exact start line, parking and arrival instructions with the organiser. A listed town or postcode may cover a wider area.

About the race

Trail races on the Switchgrass trails beside Wilson Lake, including the Pure Hell 140 and shorter solo options. A separate team relay is also offered.