May · Marathon
May Marathons 2026 & 2027
Find marathons taking place in May. Compare race dates, locations, course difficulty, field size and registration information. Explore 19 marathons with a confirmed date.
- Upcoming, date confirmed
- 19
- Active listings
- 62
- States
- 31
Nearby months
Upcoming may marathons
All 19 with a confirmed date, soonest first.
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Great Allegheny Ohiopyle Marathon Race Festival: Marathon, Half Marathon, 10K and 5KOhiopyle, PAMarathonHalf Marathon10K5K +1 more Rolling courseBoston Qualifier
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Colorado MarathonFort Collins, COMarathonHalf Marathon10K5K ~3,500 runners Downhill courseBoston Qualifier
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Born to Run Ultra MarathonsLos Olivos, CAMarathonDay Pass One DayDay Pass Two DayDay Pass Four Day +2 more
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New River Marathon, Half Marathon & 5KTodd, NCMarathonHalf Marathon10K5K Hilly courseBoston Qualifier
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EPIC Marathon and Running FestivalGreen Bay, WIMarathonHalf Marathon5KKids Dash Flat courseBoston Qualifier
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University Hospitals Cleveland MarathonCleveland, OH10K10K + Full Marathon - Challenge Series10K + Half Marathon - Challenge Series5K +1 more Boston Qualifier
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Windermere Marathon, Half Marathon, 10K & 5KSpokane, WAMarathonHalf Marathon10K5K +1 more ~1,500 runners Flat courseBoston Qualifier
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Austin's Backyard Ultra • Marathon • Full • Half & Memorial Day Remembrance Run 4 Miler • 8 MilerMarble Falls, TXMarathonHalf Marathon4.167 Miles10K +3 more
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Buffalo Marathon WeekendBuffalo, NYMarathonHalf Marathon5K1K +1 more ~1,209 runners Flat courseBoston Qualifier
Dates come from each race's own listing. Always confirm on the organiser's site before you book travel.
Largest May Marathons
By estimated field size across all distances at the event.
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Cincinnati Flying Pig MarathonCincinnati, OH Usually held in May · date not confirmedMarathonHalf ~40,000 runners Hilly courseBoston Qualifier
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Pittsburgh MarathonPittsburgh, PA Usually held in May · date not confirmedMarathonHalf5K ~30,000 runners Rolling courseBoston Qualifier
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Denver Colfax MarathonDenver, CO Usually held in May · date not confirmedMarathonHalfUrban 10 MilerMarathon Relay +1 more ~25,000 runners Rolling courseBoston Qualifier
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Hoag OC Marathon Running FestivalCosta Mesa, CA Usually held in May · date not confirmedMarathonHalf5KCombos ~25,000 runners Flat courseBoston Qualifier
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Lincoln MarathonLincoln, NE Usually held in May · date not confirmedMarathonHalf ~12,000 runners Rolling courseBoston Qualifier
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Cleveland MarathonCleveland, OH Usually held in May · date not confirmedMarathonHalf ~11,000 runners Rolling courseBoston Qualifier
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Fargo MarathonFargo, ND Usually held in May · date not confirmedMarathonHalf ~9,000 runners Flat courseBoston Qualifier
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Rock 'n' Roll San DiegoSan Diego, CA Usually held in May · date not confirmedMarathonHalf5K ~9,000 runners Flat courseBoston Qualifier
May Marathons by state
- California (7)5 upcoming races
- Idaho (4)1 upcoming race
- Ohio (4)1 upcoming race
- Wisconsin (4)1 upcoming race
- Colorado (3)2 upcoming races
- Kansas (3)3 races listed
- Pennsylvania (3)2 upcoming races
- Washington (3)2 upcoming races
- Illinois (2)1 upcoming race
- Maine (2)2 races listed
- Michigan (2)2 races listed
- New Hampshire (2)2 races listed
- New York (2)1 upcoming race
- Utah (2)1 upcoming race
- Vermont (2)2 races listed
- Wyoming (2)2 races listed
Annual events awaiting their next date
These marathons are held every year, but the next date isn't in the listing yet.
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Cincinnati Flying Pig MarathonCincinnati, OH Usually held in May · date not confirmedMarathonHalf ~40,000 runners Hilly courseBoston Qualifier
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Pittsburgh MarathonPittsburgh, PA Usually held in May · date not confirmedMarathonHalf5K ~30,000 runners Rolling courseBoston Qualifier
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Denver Colfax MarathonDenver, CO Usually held in May · date not confirmedMarathonHalfUrban 10 MilerMarathon Relay +1 more ~25,000 runners Rolling courseBoston Qualifier
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Hoag OC Marathon Running FestivalCosta Mesa, CA Usually held in May · date not confirmedMarathonHalf5KCombos ~25,000 runners Flat courseBoston Qualifier
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Lincoln MarathonLincoln, NE Usually held in May · date not confirmedMarathonHalf ~12,000 runners Rolling courseBoston Qualifier
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Cleveland MarathonCleveland, OH Usually held in May · date not confirmedMarathonHalf ~11,000 runners Rolling courseBoston Qualifier
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Fargo MarathonFargo, ND Usually held in May · date not confirmedMarathonHalf ~9,000 runners Flat courseBoston Qualifier
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Rock 'n' Roll San DiegoSan Diego, CA Usually held in May · date not confirmedMarathonHalf5K ~9,000 runners Flat courseBoston Qualifier
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Bayshore MarathonTraverse City, MI Usually held in May · date not confirmedMarathonHalf Marathon10KKids Fun Run ~7,500 runners Flat courseBoston Qualifier
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Cellcom Green Bay MarathonGreen Bay, WI Usually held in May · date not confirmedMarathonHalf5K ~7,500 runners
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Buffalo MarathonBuffalo, NY Usually held in May · date not confirmedMarathon ~7,000 runners Flat courseBoston Qualifier
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Chicagoland Spring Marathon, Half Marathon & 10KSchaumburg, IL Usually held in May · date not confirmedMarathonHalf Marathon10K ~6,000 runners Flat courseBoston Qualifier
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Ogden MarathonOgden, UT Usually held in May · date not confirmedMarathonHalf ~6,000 runners Downhill courseBoston Qualifier
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Pro Football Hall of Fame MarathonOH Usually held in May · date not confirmedMarathonHalf10K5K ~6,000 runners
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Eau Claire MarathonEau Claire, WI Usually held in May · date not confirmedMarathonHalf Marathon10K5K +2 more ~5,000 runners Rolling courseBoston Qualifier
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Sunburst RacesSouth Bend, IN Usually held in May · date not confirmedMarathonHalf Marathon10K5K ~5,000 runners
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Vermont City MarathonBurlington, VT Usually held in May · date not confirmedMarathonHalf ~5,000 runners Rolling courseBoston Qualifier
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Maine Coast Marathon, Half Marathon & 5KWells, ME Usually held in May · date not confirmedMarathonHalf Marathon5K ~4,000 runners Flat courseBoston Qualifier
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Wichita Riverfest MarathonWichita, KS Usually held in May · date not confirmedMarathonHalf ~3,500 runners
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YMCA Famous Idaho Potato Marathon & Fun RunsBoise, ID Usually held in May · date not confirmedMarathonHalf Marathon10K5K ~3,000 runners Flat courseBoston Qualifier
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Festival Foods La Crosse Marathon & Grandad Half MarathonLa Crosse, WI Usually held in May · date not confirmedMarathonHalf MarathonRelay5K ~2,500 runners Downhill courseBoston Qualifier
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Providence MarathonEast Providence, RI Usually held in May · date not confirmedMarathonHalf5K ~2,500 runners
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Coeur d'Alene MarathonCoeur d'Alene, ID Usually held in May · date not confirmedMarathonHalf Marathon10K5K ~2,000 runners
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Grand Rapids MarathonGrand Rapids, MI Usually held in May · date not confirmedMarathonHalf ~2,000 runners
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Whitefish Marathon, Half Marathon & 5KWhitefish, MT Usually held in May · date not confirmedMarathonHalf Marathon5K ~1,600 runners Hilly courseBoston Qualifier
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Capital City MarathonOlympia, WA Usually held in May · date not confirmedMarathonHalf MarathonFive MileKids' Run ~1,500 runners Rolling courseBoston Qualifier
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Sugarloaf Marathon & 15KCarrabassett Valley, ME Usually held in May · date not confirmedMarathon15K ~1,500 runners Downhill courseBoston Qualifier
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Whiskey Row MarathonPrescott, AZ Usually held in May · date not confirmedMarathonHalf Marathon10K5K +1 more ~1,500 runners
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Newport MarathonNewport, OR Usually held in May · date not confirmedMarathonHalf Marathon10K5K ~1,200 runners Flat courseBoston Qualifier
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Med City MarathonRochester, MN Usually held in May · date not confirmedMarathonHalf ~1,000 runners Flat courseBoston Qualifier
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Greenland Half Marathon & MarathonGreenland, NH Usually held in May · date not confirmedMarathonHalf Marathon ~800 runners
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Brookings MarathonBrookings, SD Usually held in May · date not confirmedMarathonHalfRelay ~600 runners
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Shiprock MarathonShiprock, NM Usually held in May · date not confirmedMarathonHalf10K5K ~600 runners Hilly courseBoston Qualifier
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Garden City MarathonGarden City, KS Usually held in May · date not confirmedMarathonHalf ~500 runners
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Sun Valley MarathonSun Valley, ID Usually held in May · date not confirmedMarathonHalf ~500 runners
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Scenic City Trail RaceRed Bank, TN Usually held in May · date not confirmedTrail Marathon and Trail Half Marathon (looped course~6.65 mi laps); also shorter options ~400 runners
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Gate City Marathon, Half Marathon & RelayNashua, NH Usually held in May · date not confirmedMarathonHalf MarathonMarathon Relay ~300 runners
Guides from the RaceRove blog
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 9 min read How to Run a Race in All 50 States How to plan a 50-state running challenge: set your own rules, group states into trips, build a calendar around the seasons, budget for it and keep track of every finish.
- 8 min read How to Choose the Best Half Marathon for a PR, Racecation or 50-State Challenge The best half marathon depends on what you want from it. How to choose a course for a personal record, a race worth travelling for, or an efficient stop on a 50-state challenge.
- Blog All guides Planning advice for finding, choosing and travelling to races.
May Marathons 2026 & 2027: common questions
- How many may marathons are there?
- RaceRove currently lists 19 upcoming races with a confirmed date, plus 43 annual events whose next date hasn't been announced yet.
- How long is a marathon?
- A marathon is 26.2 miles (42.2 kilometres).
Search every marathon in May
Filter by state, course profile and field size, save races to a shortlist and compare them side by side in the interactive search.