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Monarch Lake to Crater Lake



14.9 mile 24.0 kilometer out and back
91% Runnable


Ascent: 2,017' 615 m
Descent: -2,017' -615 m
High: 10,343' 3,153 m
Low: 8,350' 2,545 m


Avg Grade: 5% (3°)
Max Grade: 25% (14°)


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Gorgeous scenery with waterfalls and wildflowers ending at a breathtaking cirque and glacier lake.

Kristen Arendt

Features Fall Colors · Lake · River/Creek · Views · Waterfall · Wildflowers · Wildlife


This run has a great mix of scenery and culminates with a spectacular view of Lone Eagle Peak towering over Crater Lake. The trail follows Buchanan and Cascade Creeks much of the way and has vantage points that overlook multiple waterfalls. Although Crater Lake is only ~8 miles back into the Indian Peaks Wilderness, this trail feels remote and you'll enjoy a quiet outing with a few other trail users.

Need to Know

During the summer and especially during the weekend, backpacking permits can run out. Be sure to call ahead of time if you are looking to camp overnight.

Runner Notes

This run features fairly well-groomed singletrack with minimal rocks/roots. Most of this trail is completely runnable with only a couple tricky, rocky sections near the waterfalls along Buchanan and Cascade Creek.


The run starts from Monarch Lake which is located on the east side of Lake Granby. Start by checking in at the Ranger Station at the parking lot and heading out on the north side of the Monarch Lake Loop (a flat, easy 4-mile loop around Monarch Lake). On the far side of the lake at ~ 1.5 miles, stay left on Cascade Trail to start the climb.

The climb starts with some easy switchbacks through aspen and pine groves winding along Buchanan Creek. Wildflowers are abundant here and you should also keep an eye open for moose during the spring and summer. There are several waterfalls along Buchanan Creek and Cascade Creek.

There are two major trail intersections both of which are clearly marked. At ~3.5 miles, stay right on Cascade Trail at the split for Buchanan Pass Trail. At the second intersection at ~6.5 miles, stay right again to head toward Crater Lake. The trail to the left continues onto Pawnee Pass Trail.

After the intersection for Pawnee Pass Trail, you'll come to an open meadow with a large boulder field on the left-hand side. The trail crosses a large flat rock bed here and is marked by rock cairns. Follow the cairns, and you'll pick up the dirt singletrack again on the far side where several steep switchbacks will then take you up to the lake basin.

The trail appears to dead-end at Mirror Lake which is a small lake with Lone Eagle Peak in the background. Don't stop here, however, as you can pick up a singletrack trail on the west side of Mirror Lake that will take you to Crater Lake and the stunning view of Lone Eagle Peak and Mt. Achonee. Backcountry campsites are available around Crater Lake if you need more time to take in the view!

Flora & Fauna

Abundant wildflowers in the summer and aspen groves with lots of color in the fall. Look for deer and moose in the meadows along the creek.

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Nov 10, 2019
Kate Clem
A little muddy at the beginning and snowy at the end, but absolutely beautiful! In the entire hike, I only saw 2 people. — 8h 10m
Jul 21, 2019
Mirka Gores
Fun run with pretty views and waterfalls. Done it 4 days after returning from 100 feet of elevation. It went surprisingly well. 16.5mi — 4h 39m
Jul 11, 2019
matthew jezewski
Jun 30, 2019
Jenna Cowie
20mi — 5h 01m
Jul 6, 2018
Amy Shertzer
Great round trip to Crater Lake! 16.5mi
Jun 29, 2018
Michael Peterson
Jun 7, 2018
bap Peterson
Jul 22, 2017
Jeannie Clidence
Did some laps - perfect, mostly mellow trail! 22mi — 6h 00m

Trail Ratings

  4.9 from 70 votes


in Monarch Lake


  4.9 from 70 votes
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in Monarch Lake


in Colorado


1,187 Views Last Month
121,402 Since Jul 24, 2015



Lone Eagle Peak above Mirror - from the Crater Lake Trail
Apr 14, 2015 near Granby, CO
Lone Eagle Peak reflected in unnamed small pond
Apr 14, 2015 near Granby, CO
Crater Lake and Mt Achonee (12,649')
Aug 14, 2018 near Granby, CO
Looking southward at Lone Eagle Peak
Jul 9, 2018 near Granby, CO
At the cirque. Pure happiness.
Oct 29, 2017 near Granby, CO
Monarch Lake trailhead in the early morning
Aug 14, 2018 near Granby, CO

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