Half Marathon Course 2023 ‘Clockwise’

The Heavy half will start at Rio Grande Park at 7:30am (Cut off times at aid stations will be enforced) Course limit 6 hours.

2023 Aspen Backcountry Marathon, 21K Course Description

Start – 7:30am The half marathon will start at Rio Grande Park.

Leave Rio Grande Park and follow the Rio Grande Trail until it joins a series of single-track trails that parallels the Rio Grande Trail.

Turn left onto the Grindlay Bridge and cross the Roaring Fork River and then a right turn onto the Music Tent single track trail.

Cross the Roaring Fork River again via the Picnic Point Bridge and turn left on the Rio Grande Trail.

Follow the Rio Grande Trail and adjacent single-track trails to Stein Park and Aid Station #1 at 2.28 miles until a right turn onto the Sunnyside Trail.

Follow the Sunnyside Trail until it joins the Upper Plunge Trail,

Follow the Upper Plunge trail to the Lower Plunge Trail, Follow the lower Plunge trail into the Hunter Creek Valley.

Take the Hunter Creek Valley North trail to the Hunter Creek Valley South Trail to the Iowa Shaft Trail.

Take the Hunter Creek Cut off Trail, to the Smuggler Mountain Road Trail, and head down Smuggler
Mountain Road.

Turn left onto Silverlode Drive, right onto Park Circle, Cross King St and take the Oklahoma Flats trail.

Turn right on to Rio Grande trail and follow it into the finish at Rio Grande Park.


Half Marathon aid station locations.  Cut off times are TBD*

Mile Location Supplies Cut-off Times
Stein Park   Water, Skratch, snacks
Top of Lower Plunge   Water, Skratch, snacks
Smuggler Mountain Rd.   Water, Skratch, snacks
Finish Line   Water, Skratch, snacks

Event Links

Course Map