Lost Lake Trail is a 2.6 mile moderately trafficked out and back trail located near Buena Vista, Colorado that features a lake and is good for all skill levels. The trail offers a number of activity options and is accessible year-round. Dogs and horses are also able to use this trail.

2.6 miles
465 feet
Out & Back

dog friendly

kid friendly


cross country skiing



horseback riding

nature trips

trail running








Cottonwood Pass road is closed until Memorial Day, 2019. A short, easy hike below the summit of Cottonwood Pass good warm up for other hikes in the Collegiate Mtn Range as well as excellent aspen viewing in Sept. Lost lake is below the continental divide with beautiful turquoise water & incredible 360 degree views. South of the lake is the Sanford Basin with 13ers Mt Kreutzer & Jones Mtn. Trailhead is unmarked when you see the final 2 switchbacks on Cottonwood the trail is on the left with asphalt pullout / parking on the right

1 month ago

Cottonwood Pass road is closed all year until Memorial Day , 2019. It’s closed at the Avalanche trailhead. The Forest Service is so underfunded that they have to rely on volunteers, no doubt that’s where the misinformation in the previous review came from.

2 months ago

Because of the previous review saying that the road was closed, I called the ranger district and a young lady told me the private road was closed but the public road was open. The public road was Cottonwood Pass, which is closed. We talked to many local people and they said there’s no way to get to Lost Lake Trail this summer until Cottonwood Pass opens back up.

3 months ago

road is closed 8 miles from the trailhead 7/3/18

4 months ago

Completed this hike on 6/14/18. This is an easy hike but has a lot of mud to navigate through. The payoff in the end is well worth it and it does not take a very long time to get to the lake. Once we got to the lake we saw a herd of elk to the south a little ways. Great Hike!

4 months ago

It's June 10. It was a great hike with ups and downs. Mud patches here and there but ways around and through it. Beautiful lake!

4 months ago

Nice hike exactly 18.1 miles outside of town. TH isn't marked and there is a paved pullout on the opposite side of the street with enough space for two cars. Early spring conditions included mud (that required wading throug) and some snow patches that you could go around. Lake is beautiful. See pics and more detail here: https://etbtravelphotography.com/2018/06/06/roadtrip-to-the-rockies-hiking-in-buena-vista/

4 months ago

Nice hike and good one for flatland ders still adjusting to altitude. early spring requires you to trudge through a pretty swampy and muddy section, but it is short...maybe 30 feet or so.

4 months ago

June 1, 2018 - nice hike, lot of patches of snow 1-2+ feet deep to slow us down, That added more work to what should have been an easy hike. All in all it was worth the scenery.

4 months ago

Tuesday, August 15, 2017

Tuesday, July 25, 2017

Monday, June 26, 2017