12 of the best marathons around the world: Mix running with adventure with our top race picks
Runner's World just dropped their roundup of 12 best adventure marathons across the globe, and it's worth your attention if you've been coasting on the Abbott Majors circuit thinking that's the only way to chase a bucket-list 26.2.
Clay Masterson, Backcountry Conditioning Expert & Gear Pragmatist·updated July 11, 2026
The terrain problem nobody talks about
Read past the Instagram bait. The Angkor Wat route winds through temple complexes in brutal heat and jungle humidity. Kangaroo Island throws undulating trails through Flinders Chase National Park — cliffs, beaches, eucalyptus. Even the "flat" Disney World option is a logistical grind across four parks.
None of these are road marathons in disguise. The Kangaroo Island course alone will punish quads that haven't logged vertical on technical footing. The Vilnius route threads through a World Heritage old town and along the Neris riverbank — scenic, yes, but cobblestones and park terrain demand different foot mechanics than asphalt. You can't train for jungle humidity in an air-conditioned gym. And you sure as hell can't fake your way through 23 wine-tasting stations at the Médoc without your pacing falling apart in the back half.
So before you book the flight, audit your training block honestly. Have you been running real elevation? Have you trained in heat? Do you have a fueling strategy that survives hours of variable terrain? If you're answering no to any of those, you don't need a passport — you need another six months of prep.
Gear for conditions you actually face
Hot-weather destination racing is its own beast, and one piece of recent news lands well here. Flagstaff-based brand Unknown Runner just launched the Courser Collection with Nuyarn — an ultralight 115-gsm merino blend (63% merino, 29% polyester, 8% nylon) built specifically for hot, variable trail conditions. The open-knit structure breathes and dries fast, which matters when you're grinding through Angkor-style humidity or a coastal Australian summer. For runners eyeing these adventure races as their next goal, kit like this isn't a luxury — it's a hedge against the heat hammering your cardiac output before you hit the halfway mark.
Pick the race that fits your training, not your feed
The honest move: match the event to your current fitness, not your fantasy. If you can't handle technical descents, skip the island ultras. If heat tolerance isn't built, don't sign up for equatorial temple runs in peak wet season. The wine marathon sounds fun until dehydration and sugar load wreck your split. Pick the event that forces you to train your weakness, not the one with the best photo op. That's how you actually finish strong instead of limping through a travel insurance claim.