RacesFilter

Hottest marathons

Hot is the top band of the difficulty heat score: median high of 25°C or more, or median dew point above 20°C, whichever is harsher. The window is the race date plus or minus 7 days, 2011–2025.

How the difficulty and PR scores are built

Marathon San José Costa RicaDecember 2026San José · CR
RunningMarathon · Half marathon · 10K · 5K

San José Marathon

Difficulty 57

Open · Direct entryRace guide →
Honolulu MarathonDecember 2026Honolulu · US
RunningMarathon

Honolulu Marathon

Difficulty 49 · PR 4

Open · Direct entryRace guide →
Maui Oceanfront MarathonJanuary 2027Wailea to Launiupoko · US
RunningMarathon · Half marathon · 5K

Maui Oceanfront

Difficulty 45

Open · Direct entryRace guide →
Big Island International MarathonMarch 2027Hilo · US
RunningMarathon · Half marathon · 10K · 5K

Big Island Intl Marathon

Difficulty 45

Open · Direct entryRace guide →
The Kauaʻi Marathon & Half MarathonSeptember 2027Koloa / Poipu · US
RunningMarathon · Half marathon

Kauai Marathon

Difficulty 49

Open · Direct entryRace guide →