Bison Trail aka Dog Run Hollow is one of the best trail running loops in Oklahoma. Located in the Wichita Mountains Wildlife Refuge, this trail has multiple access points. The trail itself is good, relatively flat and easy to follow. The western end of the loop passes by the 40 Foot Hole canyon, which has a big (rain-dependent) waterfall. Springtime brings lots of wildflowers. As always, be snake-aware in the Wichitas.

Charons Garden is still a little known gem in the Wichita Mountains of Oklahoma. This epic loop route encompasses class III+ scrambling and backcountry route-finding to summit the "big 6" (tallest named 2,000' peaks) within the wilderness area. It is one of Oklahoma's best challenges! With 4,000' of elevation gain and over 11 miles of mixed terrain, this route is best done in the winter months to avoid heat, snakes, and overgrowth. Begin at the Sunset Parking Lot in the Wichita Mountains Wildlife Refuge. Ascend the standard trail up Elk Mountain.

A route devised by the Night Runners running club.  Covering the most popular trails in the Cabo Rojo, Puerto Rico, this 50K will challenging you to conquest the peak of Sierra Bermeja, go around the oldest Salt Mines (Las Salinas) in the new world, past Los Morrillos Lighthouse (built in 1881) and enjoy the trails in the area.  The route is:  Viandon-Las Guanabanas-El Perro-Sierra Bermeja-Vertedero-Monte Carlos- Las Salinas-El Faro-Combate-Mirador-Triple Perro-Iguana-Quebrada Seca-Los Pozos-Viandon.