← All races
Trail

Cloudsplitter 100

📅 October 11, 2027 (estimated date)📍 Norton · United States🏅 since 2014

⚠️ 2027 edition: provisional information

The date is estimated from the 2026 edition (October 12, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.

Available distances

97.9 mi68.8 mi31.1 mi15.5 mi

Races on the programme

RaceDistanceElevation gain
Trail 97,87 mi97.9 mi18,406 ft
Trail 68,85 mi68.8 mi12,008 ft
Trail 31,07 mi31.1 mi7,441 ft
Trail 15,53 mi15.5 mi3,727 ft

About

The Cloudsplitter 100 takes place in Norton, Massachusetts, deep in mountain forest on wild, remote trails. Runners can choose from four distances: 25K (15.5 miles), 50K (31 miles), 100K (62 miles), and 100 miles.

Highlights

  • Off-road
  • Forest
  • Mountain
  • High altitude
D-358

Prepare for Cloudsplitter 100 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
Create my free plan No credit card. Sign up in 30 seconds.

Races nearby

Other upcoming races around Norton.