May 1, 2027 · 7:45 AM · South Bend, IN
Run Happy 50K (and other happy distances)
10KHalf MarathonMarathonUltra
- Price
- $43.40-$59.30
Ultras in May
Every upcoming Ultra race we know about in May. Where a detail isn't confirmed, we mark it unknown rather than guessing.
Race results
Where
When
Showing 20+ of 20 races · loading the full list…
May 1, 2027 · 6:00 AM · Winter Park, FL
Sunshine Double
5K10KHalf MarathonMarathonUltraCertified course · per organizer
- Price
- $32.80-$149.40
May 1, 2027 · 7:00 AM · Larkspur, CO
Greenland Trail Races
Ultra
- Price
- $39.80-$99.20
- Field size
- 185 · based on the organizer's entry cap
May 8, 2027 · 8:30 AM · Berkeley, CA
Grizzly Peak Trail Run
10KHalf MarathonMarathonUltra
- Price
- Free-$96.40
May 8, 2027 · 8:00 AM · Rockford, MN
Trail Mix Race
Ultra
- Price
- $25-$50
- Field size
- 290 · based on the organizer's entry cap
May 8, 2027 · 7:30 AM · Chattanooga, TN
Scenic City Cyclo
Ultrarolling hills
- Price
- Price on registration site
May 15, 2027 · 7:00 AM · Spicewood, TX
Pechanga Trail Run
1M5K10KHalf MarathonMarathonUltra
- Price
- $11.60-$97.46
May 15, 2027 · 8:00 AM · Waterloo, IA
Death by 5k Waterloo
Ultra
- Price
- $165.30
- Field size
- 191 · based on the organizer's entry cap
May 15, 2027 · 5:30 AM · Key West, FL
KEYS100 Ultramarathon
Ultra
- Price
- $255.40-$1,093
- Field size
- 550 · based on the organizer's entry cap
May 16, 2027 · 7:00 AM · Thurmond, WV
Highball to Thurmond Ultra & Relay
Ultra6,000 ft gain
- Price
- $97.40-$176.90
May 22, 2027 · 8:30 AM · Pittsburgh, PA
Rise Up Hero Trail Runs at Settlers Cabin Park - 50K, 25K, 8miler, 5K - A Last Trail Standing Event
5KUltra2,300 ft gain
- Price
- $53.19-$84.99
May 22, 2027 · 6:00 AM · Richfield, OH
High Lea 6/12/24 Hour and 100 miler
UltraWalker-friendly · per organizer
- Price
- $64.60-$239.50
May 29, 2027 · 10:15 AM · Glen Rose, TX
High Hope Endurance Run 2027 - 200K - 100K - 50K - 25K - 10K - 5K
5K10KUltra
- Price
- Free-$239.50
- Field size
- 45 · based on the organizer's entry cap
May 29, 2027 · 7:30 AM · Georgetown, TX
River's Edge Trail Race
1M10MUltra
- Price
- $15.10-$128.52
- Field size
- 517 · based on the organizer's entry cap
May 31, 2027 · 5:00 AM · College Grove, TN
Sgt David Hierholzer Memorial Day 50k
Ultra
- Price
- Price on registration site