San Isabel National Forest

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645 mi 1,038 km of trail — 22 Runs

25 Trails

85 Trails

57 Trails

Areas Within San Isabel National Forest

Mount Massive Wilderness

16 Trails

Mt. Antero Trails

7 Trails

Runs in San Isabel National Forest - 22

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Mt. Elbert

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

(76) Leadvil…, CO

Ice Mtn & The Three Apostles from Huron Pk with permission from BoulderTraveler

Huron Peak

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

(20) Buena V…, CO

Sayres Mountain hides behind columbines in the early morning shade.

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

Looking south at the Continental Divide.

Poplar Gulch Trail

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

(2) St. Elmo, CO

Big Willis Gulch Trail

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

(1) Leadvil…, CO

Black Cloud Trail

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

(17) Leadvil…, CO

The Turquoise Lake Trail varies from sandy beach to packed-sand trail. You just can't beat the views.

Leadville Trail 100

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

(5) Leadville, CO

We made it to the top! Not bad for senior citizens!

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

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

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	5
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	2
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	5
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	1
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	1
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	1
11.9 mi 19.1 km #9Canyon Creek Trail Difficult Salida, CO	Difficult	11.9 mi 19.1 km	Salida, CO	1
6.7 mi 10.8 km #10Starvation Creek Difficult Salida, CO	Difficult	6.7 mi 10.8 km	Salida, CO	1
4.4 mi 7.1 km #11Silver Creek Trail Difficult Saguache, CO	Difficult	4.4 mi 7.1 km	Saguache, CO	1
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	5
3.6 mi 5.8 km #14Mt. Massive Trail Difficult Leadville North, CO	Difficult	3.6 mi 5.8 km	Leadville North, CO	5
1.4 mi 2.2 km #15Mt. Harvard Difficult Buena Vista, CO	Difficult	1.4 mi 2.2 km	Buena Vista, CO	3
7.0 mi 11.3 km #16Green's Creek Intermediate/Difficult Salida, CO	Intermediate/Difficult	7.0 mi 11.3 km	Salida, CO	3
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	3
2.3 mi 3.6 km #18Narrow Gauge Trail #1432 Easy/Intermediate Alpine, CO	Easy/Intermediate	2.3 mi 3.6 km	Alpine, CO	6
1.0 mi 1.7 km #19Windsor Lake Trail Difficult Leadville North, CO	Difficult	1.0 mi 1.7 km	Leadville North, CO	6
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	6