RacesFilter

High-altitude races

High altitude starts at 1,500 m. Most of these figures are the Open-Meteo grid elevation at the start coordinate, not a surveyed start mat. A course-file sample wins when we have one.

How the difficulty and PR scores are built

Denver Colfax MarathonMay 2027Denver · US
RunningMarathon · Half marathon · 5K

Colfax Marathon

Difficulty 55

Open · Direct entryRace guide →
BOLDERBoulder 10KMay 2027Boulder · US
Running10K

BOLDERBoulder

Difficulty 55

Open · Direct entryRace guide →
Western States 100 Endurance RunJune 2027Olympic Valley · US
UltraUltra

Western States 100

Difficulty 87 · PR 2

Ballot openRace guide →
SBT GRVL Steamboat SpringsJune 2027Steamboat Springs · US
GravelGravel

SBT GRVL

Difficulty 79

Closed · LotteryRace guide →
Maratona dles DolomitesJuly 2027Corvara · IT
CyclingGran fondo

Maratona dles Dolomites

Difficulty 63 · PR 18

Ballot openRace guide →