Oklahoma
ModerateWichita Mountains Wildlife Refuge Backcountry Road Network
Ancient granite domes and buffalo range
Feature: Camping
Oklahoma
ModerateTalimena National Scenic Drive
Ouachita Mountain crest ridge runner
Oklahoma
DifficultRobbers Cave Cross Timbers Trail
Outlaw caves and technical sandstone crawling
Oklahoma
ModerateOuachita National Recreation Trail
Ridge-running backbone through the Ouachitas
Iceland
DifficultVatnsdalur F578 Glacier Valley Traverse
Isolated glacial valley with abandoned settlements
Iceland
ModerateWestman Islands F261 Volcanic Access Route
Volcanic moonscape on Iceland's newest terrain
Iceland
ExpertEyjafjarðardalur F821 Highland Circuit
Remote highland crossing through glacial wastelands
Iceland
ModerateKerlingarfjöll Geothermal Circuit F347
Highland geothermal wonderland access route
Iceland
ModerateHveravellir Highland Traverse F35
Highland crossing between glaciers with hot springs
Iceland
ExpertÞórsmörk Valley F249 River Challenge
Multiple glacial river fords to hidden valley