A better way to choose your next half marathon
HalfRuns is your guide to the 13.1-mile distance. We cover every active half marathon in the United States — 3,000+ races across all 50 states — and rank them on the things that actually tell you whether a race is worth your time.
Why this exists
Race directories are either pay-to-play lists or sparse calendars. Neither tells you which races are great. A 5,000-runner event with a 25-year history reads the same as a 30-runner one-off in someone's backyard.
HalfRuns is built around one question: given everything we know about this race, is it worth running?How long it's been around, how many people run it, who comes back year after year, the course, how far runners travel, and how fast the front of the pack is — it all adds up to a score we publish right out in the open.
22M+ finish times
Real finish times going back two decades, pulled from the major timing companies and refreshed every week.
Quality scoring
Every race gets a score out of 100 across eight simple factors — and we mark down the copy-paste race series that clog the calendar.
No paid placement
We don't take money to rank races higher. Spending on ads doesn't change a race's score by a single point.
See how races are rated
Want the details? See exactly what we measure, how much each part counts, and what triggers the filler-race markdown.
See how we rate races