St. Mary's Glacier

EASY 171 reviews
#3 of 112 trails in

St. Mary's Glacier is a 1.4 mile moderately trafficked out and back trail located near Idaho Springs, CO that features a lake and is good for all skill levels. The trail offers a number of activity options and is accessible from December until February. Dogs are also able to use this trail but must be kept on leash.

1.4 miles 360 feet Out & Back

dogs on leash

kid friendly




ice climbing

nature trips


trail running


cross country skiing



On I-70, take exit 238 and head north on County Road 275 for about nine miles. The trail head will be on the left side of the road and requires a $5.00 parking fee at the lot.

1 day ago

nice little hike to lake/glacier. my girlfriend and i hiked past the glacier to the cliff behind the lake and had sex up there (I have since named it fuck rock) most scenic love making ever!

1 day ago

My favorite spot in Colorado !

Nice hike. Short but has some steeper parts. Very rocky so watch your footing. Lake at the top was beautiful!

2 days ago

Great spot for a little cliff jumping! Pretty crowded so go early.

4 days ago

This trail should be listed as moderate to hard. The trail is above 10,000 feet, very rocky and on an incline, which would be difficult for anyone with weak knees, a bad heart or out of shape. Go early and take your time.

7 days ago

8 days ago

Short hike, very crowded, very rocky trail. No clear signage to lake, but following the crowd will get you there. Saw a small ice field behind the lake, assuming that's the glacier. Parking lots near the trailhead charge $5/vehicle. There are much better hikes around.

14 days ago

17 days ago


17 days ago

Hiked this today after 2 inches of snowfall last night. On the way up it was mostly sunny, on arrival it got grey and began to snow, then winds came in and about an inch of snow fell in an hour. We stayed up there to shoot photos and the sky half cleared for breathtaking views. Some people were snowboarding above the glacier too. Great short hike. Trail splits a couple times, you mostly want to stay on the trail that goes up, not down, until you see the lake.

20 days ago

Beautiful little hike!

21 days ago

One of my favorite places just outside of Denver. Easy to moderate 1 mi hike up, then you can hike above the lake and glacier as much as you please. Spectacular views. Weather turns very quickly so be prepared.

22 days ago


24 days ago

This was a great way to spend a few hours. I don't think I would describe it as easy but maybe moderate. we climbed the hill on the opposite side of where the trail opens up to the lake and that was really worth the effort. I have friends coming out in a couple of weeks and I'll probably take them there.

29 days ago

Very steep!

30 days ago

Easy for natives used to altitude. Very rocky. Wear appropriate footware especially if you want to cross the glacier to get to the top. Gorgeous view!

30 days ago

Absolutely beautiful views! A must hike!

1 month ago

Go early and during a weekday to avoid the crowd. We talked to a guy that had been there 35 years ago with his dad and sadly the glacier used to cover way more than it does now. Still a must visit.

1 month ago

1 month ago

Great beginner hike,