4,200 miles from the Pacific to the Atlantic. The longest road ultra-race on earth. Self-supported across 10 states. Ame
350 miles of Kansas limestone hell with zero aid stations. The ultimate test of whether you actually like riding bikes o
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Unbound XL scores 1 points higher overall (91 vs 90), but the right choice depends on what you value most.
"The longest self-supported bike race on earth—4,200+ miles from Pacific to Atlantic, crossing 10 states, no support crews, pure transcontinental adventure."
"The longest gravel race that matters, where the Flint Hills strip away everything but what's left of your soul."
Trans Am Bike Race rates as the more demanding race based on our composite difficulty score (averaging length, technicality, elevation, climate, and altitude ratings). If you're looking for the bigger challenge, go with Trans Am Bike Race. If you want a more accessible race, Unbound XL is the better pick.
Unbound XL scores 91/100 compared to 90/100 in our 15-dimension Gravel God Rating. The overall score reflects course profile, prestige, race quality, community, and value.
Trans Am Bike Race is generally more accessible for first-time gravel racers, factoring in distance, technicality, and logistical ease. Check each race's full profile for distance options and beginner-specific advice.
Both races take place in June, which means you may need to choose between them. Check the official race websites for exact 2026 dates.
Trans Am Bike Race is held in Astoria, Oregon to Yorktown, Virginia. Unbound XL is held in Emporia, Kansas. Consider travel logistics, especially if you're flying in — check our full race profiles for airport and lodging details.
Get a personalized training plan for either race — tailored to your fitness, schedule, and goals.
$15/week, capped at $249. One-time payment.