Best Half Marathons in May 2025 (USA)
The top half marathons happening across the United States in May 2025, ranked by RaceScore — our 0–100 composite of PR potential, value for money, vibe, beginner-friendliness, and data confidence. Whether you're chasing a personal record, looking for a beginner-friendly first half marathon, or planning a destination race weekend, this guide narrows the calendar to the events most worth your time.
Top 2 half marathons this may
How we rank half marathons
Every race on running.services is scored on a deterministic 0–100 scale we call RaceScore. It's a weighted blend of:
- PR potential — flat, fast, weather-friendly courses score higher.
- Value for money — entry fee versus what's included.
- Vibe — crowd, scenery, post-race party, festival features.
- Beginner-friendliness — generous cutoffs, walker policy, course support.
- Family-fit — kids races, stroller policy, spectator access.
- Data completeness — verified course, photos, elevation, reviews.
Frequently asked questions
What is the best half marathon in May 2025?
Based on RaceScore, the highest-rated half marathon in May 2025 is RBC Brooklyn Half in New York City, NY. It scores well on a balance of PR potential, value, and runner-rated vibe.
How many half marathons are there in the USA in May 2025?
We currently track 2 confirmed half marathons on the May 2025 calendar. The list updates automatically as organizers publish new events.
Is May a good month to run a half marathon?
May sits in the shoulder season for most US race regions — expect mild weather and a mix of championship and casual events.
How do I find a beginner-friendly half marathon?
Look for races with a generous time cutoff, a walker-friendly policy, and a flat course. Each race detail page on running.services shows a beginner-friendliness sub-score so you can filter accordingly.
We have limited data for this month — this guide is hidden from search engines until we have more races.