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San Isabel National Forest

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645 mi 1,038 km of trail 22 Runs

Easy Trails 25 Trails Intermediate Trails 85 Trails Hard Trails 57 Trails

Runs in San Isabel National Forest - 22

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Favorite The final cairn!
Difficult

Mt. Elbert

8.9 mi 14.4 km • Loop • 4,410 ft Ascent 1344.26 m Ascent

(76) Leadvil…, CO
Favorite Ice Mtn & The Three Apostles from Huron Pk with permission from BoulderTraveler
Intermediate/Difficult

Huron Peak

6.4 mi 10.2 km • Loop • 3,301 ft Ascent 1006.19 m Ascent

(20) Buena V…, CO
Favorite Sayres Mountain hides behind columbines in the early morning shade.
Difficult

La Plata Peak Out and Back

9.4 mi 15.1 km • Out and Back • 4,276 ft Ascent 1303.2 m Ascent

(13) Leadvil…, CO
Favorite Looking south at the Continental Divide.
Difficult

Poplar Gulch Trail

12.6 mi 20.3 km • Out and Back • 4,193 ft Ascent 1278.06 m Ascent

(2) St. Elmo, CO
Favorite Beautiful fall day
Intermediate

Big Willis Gulch Trail

11.2 mi 18.1 km • Loop • 3,016 ft Ascent 919.34 m Ascent

(1) Leadvil…, CO
Favorite La Plata peaks above the ridgeline on the Black Cloud Trail.
Difficult

Black Cloud Trail

10.9 mi 17.5 km • Out and Back • 5,023 ft Ascent 1531.13 m Ascent

(17) Leadvil…, CO
Favorite The Turquoise Lake Trail varies from sandy beach to packed-sand trail. You just can't beat the views.
Difficult

Leadville Trail 100

102.0 mi 164.2 km • Out and Back • 14,637 ft Ascent 4461.48 m Ascent

(5) Leadville, CO
Favorite We made it to the top! Not bad for senior citizens!
Intermediate

Midland Hill Out-and-Back

4.9 mi 7.9 km • Out and Back • 1,586 ft Ascent 483.35 m Ascent

(6) Buena V…, CO

Trails in San Isabel National Forest - 145

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6.4 mi 10.3 km #1Browns Creek Trail #1429
Intermediate
Alpine, CO
Intermediate
6.4 mi 10.3 km Alpine, CO 26 
4.9 mi 7.8 km #2South Mount Elbert Trail #1481
Difficult
Leadville North, CO
Difficult
4.9 mi 7.8 km Leadville North, CO
6.4 mi 10.3 km #3Turquoise Lake Trail
Easy/Intermediate
Leadville North, CO
Easy/Intermediate
6.4 mi 10.3 km Leadville North, CO 11 
11.1 mi 17.9 km #4CDT: Marshall Pass to Monarch Pass (CO Sec. 18)
Intermediate/Difficult
Salida, CO
Intermediate/Difficult
11.1 mi 17.9 km Salida, CO
13.3 mi 21.3 km #5CT - Segment 9: Tennessee Pass to Timberline Lake
Intermediate
Leadville North, CO
Intermediate
13.3 mi 21.3 km Leadville North, CO
21.5 mi 34.6 km #6CT - Segment 11: Mount Massive to Clear Creek
Intermediate
Leadville North, CO
Intermediate
21.5 mi 34.6 km Leadville North, CO
13.2 mi 21.3 km #7CDT: Halfmoon Creek to Timberline Lake (CO Sec. 24)
Intermediate
Leadville North, CO
Intermediate
13.2 mi 21.3 km Leadville North, CO
13.3 mi 21.4 km #8CDT: Timberline Lake to Tennessee Pass (CO Sec. 25)
Intermediate
Leadville North, CO
Intermediate
13.3 mi 21.4 km Leadville North, CO
11.9 mi 19.1 km #9Canyon Creek Trail
Difficult
Salida, CO
Difficult
11.9 mi 19.1 km Salida, CO
6.7 mi 10.8 km #10Starvation Creek
Difficult
Salida, CO
Difficult
6.7 mi 10.8 km Salida, CO
4.4 mi 7.1 km #11Silver Creek Trail
Difficult
Saguache, CO
Difficult
4.4 mi 7.1 km Saguache, CO
2.3 mi 3.6 km #12Timberline Lake
Intermediate
Leadville North, CO
Intermediate
2.3 mi 3.6 km Leadville North, CO 10 
4.2 mi 6.8 km #13Mt. Shavano
Difficult
Salida, CO
Difficult
4.2 mi 6.8 km Salida, CO
3.6 mi 5.8 km #14Mt. Massive Trail
Difficult
Leadville North, CO
Difficult
3.6 mi 5.8 km Leadville North, CO
1.4 mi 2.2 km #15Mt. Harvard
Difficult
Buena Vista, CO
Difficult
1.4 mi 2.2 km Buena Vista, CO
7.0 mi 11.3 km #16Green's Creek
Intermediate/Difficult
Salida, CO
Intermediate/Difficult
7.0 mi 11.3 km Salida, CO
3.7 mi 6.0 km #17La Plata Peak-Blackbear Trail #1478
Difficult
St. Elmo, CO
Difficult
3.7 mi 6.0 km St. Elmo, CO
2.3 mi 3.6 km #18Narrow Gauge Trail #1432
Easy/Intermediate
Alpine, CO
Easy/Intermediate
2.3 mi 3.6 km Alpine, CO
1.0 mi 1.7 km #19Windsor Lake Trail
Difficult
Leadville North, CO
Difficult
1.0 mi 1.7 km Leadville North, CO
3.8 mi 6.1 km #20Ptarmigan Lake Trail #1444
Intermediate/Difficult
St. Elmo, CO
Intermediate/Difficult
3.8 mi 6.1 km St. Elmo, CO

Photos of San Isabel National Forest - 206

Trail Run Project is built by runners like you. Add Your Photos

View of Huron Peak and the Three Apostles from the trail
Aug 1, 2018 near Leadvil…, CO
Mount Massive, 2ND highest Colorado 14er, still snow capped, second week of July 2019. View looking west from Halfmoon Road after climbing Mount Elbert earlier this day. Mount Massive at #2 ranked is only 6 feet lower than Mount Elbert.
Aug 10, 2019 near Leadvil…, CO
Ice Mtn & The Three Apostles from Huron Pk with permission from BoulderTraveler
Jan 8, 2015 near Buena V…, CO
Virginia Peak, Winfield Peak, and Granite Mountain in the distance, looking back at the Huron Peak trail, wildflowers in full bloom.
Jul 3, 2018 near St. Elmo, CO
Huron Peak trail
Jan 27, 2018 near St. Elmo, CO
Worth the hike to get to this lake -- same trailhead as Mt. Massive, but lots of trees down made the hike a bit more challenging.
Jul 15, 2019 near Leadvil…, CO
Twin Lakes fall view with Mt Elbert, the highest peak in the Rocky Mountains on the right
Sep 17, 2018 near Leadvil…, CO
A great view of the three apostles basin.
Jul 2, 2018 near St. Elmo, CO