Available distances
100 mi48 h
About
The Dreadmill 48 Hour Endurance Challenge is a virtual treadmill challenge: 100 miles (160.9 km) to complete within 48 hours, on any two days of your choice between December 1 and December 31, 2026. There is no meeting point: you run at home or at your gym, either in one go or split across the two days.
There are two formats: the 100 Miler (100 miles in 48 hours maximum) and the 48hrs (as much distance as possible in 48 hours). The event is organized from the United States, and registration is through UltraSignup until December 8, 2026.
Prepare for Dreadmill 48 Hour Endurance Challenge with RunRun
An AI-generated training plan, adjusted every week based on your real sessions. Built around your goal, current level and race date.
- Personalized plan based on your VO2max, history and weekly availability
- Strava and Garmin sync: your sessions are analyzed and the plan adapts
- Target paces, long runs, key sessions: everything is calculated for race day
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