Alien Run Trail Biking


Notes: 9.14.21

Trail Length
9.2 miles
Distance from Durango
33 miles
640 ft
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Alien Run Trail

Durango to TH

33 Miles


640 Feet



Trail Length

9.2 Miles

Alien Run Trail

Part of the Alien Run Trails System.

Alien Run is a 9.2-mile moderate loop within the Alien Run Trail System and is a popular mountain bike ride in the Four Corners area. This loop is also the first loop of Alien Run’s optional longer routes.

The three stacked loops of Alien Run offer a variety of riding for everyone. Trails flow through smooth dirt arroyos, traverse along slickrock cliffs, and session through natural technical features. The further one rides from the trailhead, the more difficult the trail; the one-way Outer Limits trail is characterized by sections of rocky climbing, plunging downhill sections, and meandering through dune-like terrain.

Map & Directions

Map Coordinates: 36.881268, -107.864285

Where's the Trailhead?


Alien Run Trailhead

From 9th Street and Main Avenue in Durango, head west on 9th Street toward Camino Del Rio. Turn left onto Camino Del Rio/ Hwy 550. After 4.7 miles turn right to stay on Hwy 550, and continue for 25 miles. Before reaching the town of Aztec, NM, turn left onto Road 2651. After 1.8 miles, turn right at an intersection. After 0.6 miles turn left onto another road which will lead to the main trailhead for Alien Run. All of these roads are well service roads that will be messy in wet weather.


help build our trails!

Cutthroat Trail Maintenance | Saturday, September 25th

Join us for trail maintenance on Cutthroat Trail on September 25th from 9:00 am – 12:00 pm. Please note, registration is required to join us for Trailwork; please click below to register.


Trip Reports and Recent Photos

Alien Run

Submitted by: Craig

Date Visited:


Trail Condition:



Ice, mud, snow, and hard sand are the tread conditions. I don’t think it is in good condition. We rode the 5 and 10 mile loops.

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