Sick Bird is a difficult trail that parallels the eastern edge of the main Animas Mountain Trail loop.
Merv Trail is often coupled with the Swerve Trail and is just north of the popular Sailing Hawks Trail in Dalla Mountain Park.
Clark’s Cutuff trail has very fast sections with a combination of single and doubletrack flowing in and out of the Pinion/Junipers.
This is a fast and mostly downhill trail from Kinsey Ridge into the valley with lots of fun whoops and jump options, and not too much sand.
Wild Bill is a skinny ridge trail that offers four, one-foot-tall drops that are rollable or can be jumped bigger, and some steep and fast sections.
Lake View trail follows a skinny ridge with some steep sections and some optional drops, a few sections can be loose.
The Black Hole Loop is a 0.2-mile difficult loop within the Alien Run Trails and is a popular mountain bike ride in the 4-corners area.
Outer Limits is a 6.7-mile moderate loop within the Alien Run Trails and is a popular mountain bike ride in the 4-corners area.
La Plata Canyon trail is a long sustained climb up the La Plata Canyon Road to the Colorado Trail at Kennebec Pass.
White Creek Trail is a difficult and scenic high country trail near Cunningham Gulch and Highland Mary Lakes trails.