r/Ultramarathon↗
Any idiot can run a marathon. It takes a special kind of idiot to run an ultramarathon.
Reddit hub for trailrunning, ultrarunning and ultramarathons.
173k subscribers222 posts / mo in Sep 2026194 authors / mosince 2010
r/Ultramarathon has 173k members (+12% over the last 12 months). It gets about 222 posts a month from 194 people. Top topics: Ultra Training, 100 Mile Races and Ultra Runs.
When to post on r/Ultramarathon
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How r/Ultramarathon has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/Ultramarathon
Top topics
Share of the subreddit's posts
- Ultra Training12%
- 100 Mile Races9.9%
- Ultra Runs8.0%
- Ultra Running2.1%
- Marathon Records1.6%
Brands people mention
Most-mentioned brands and sites, last 12 months
- UltraSignup
- Apple
- Substack
- Science of Ultra
- Strava
Everything else about r/Ultramarathon
Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.
Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research