Boulder Brook Trail

MODERATE 8 reviews
#84 of 140 trails in

Boulder Brook Trail is a 4.7 mile lightly trafficked out and back trail located near Fall River Estates Subdivision, Colorado that offers scenic views and is rated as moderate. The trail is primarily used for hiking, walking, nature trips, and birding and is best used from March until October.

4.7 miles
1532 feet
Out & Back



nature trips




no dogs

This unassumingly attractive trail closely follows Boulder Brook through the upper-montane zone into archetypal subalpine forests. Solitude seekers will enjoy its lively waters, diverse riparian vegetation, terrific autumn foliage, and good views of the Continental Divide and Mummy Range: The trail drops from the trailhead to the brook, crosses a bridge (.12 miles) and gradually rises away through a tall lodgepole forest. It continues south past the Sprague Lake connector (.25 miles) and Glacier Creek - Storm Pass trail split (.37 miles), where it officially becomes the Boulder Brook Trail. Horses are not permitted beyond this point. The trail rejoins Boulder Brook at .55 miles (9,095') and turns sharply uphill. A steep climb beside the creek is highlighted by several waterfalls, aspen, deep green mosses and lush ground vegetation. Autumn colors are notably good on this stretch. The grade eases through .75 miles (9,430'), where small clearings yield good views of Hallet Peak (12,713'), Flattop Mountain (12,324'), Otis Peak (12,486') and Thatchtop (12,668') to the east, glimpses of Longs Peak (14,259') and Storm Peak (13,326') to the south, and sweeping views of the distant Mummy Range to the north. These water-lined meadows are also good places to find wildlife activity, particularly elk and deer. The trails makes consecutive stream crossings to Boulder Brook Backcountry Campsites #2 and #1 (2.05 miles and 2.15 miles, respectively). The trail ends rather unceremoniously at its intersection with the North Longs Peak Trail (2.4 miles : 10.311'). A few steps along it to the west is a bridge spanning an attractive section of the brook, a good place to rest before retracing your steps back to the trailhead.

10 days ago

2 months ago

you can read the length and the elevation gain. what that doesn't tell you is that after the first several beautiful waterfalls cascading picturesquely over boulders, you may never want to see another one!! Seriously, only drawback are the mosquitoes

2 months ago

2 months ago

Took the .3 mile trail to get to the fairly well marked boulder brook trail.

My wife and I are not too fit so we knew the first elevation spike was going to be a killer but made it past and things really toned down by the 3rd bridge.

Ultimately it was a good test of or abilities. One note I would make is that the mosquitos were a mess and almost completely prevented us from stopping. We were not prepared for them and were almost the hardest part of the trail.

2 months ago

2 months ago

Trail is clear. Hiked 6/19/17.
From Sprague Lake, took Glacier Creek trail to Alberta Falls to North Longs Peak Trail, and then back down Boulder Brook trail to Sprague Lake. Beautiful waterfalls, rivers, and bridges. Boulder Brook trail is quite steep so coming down was a bit cumbersome, but very doable and beautiful. I basically had the entire trail to myself. The only part where there were numerous people was from Glacier Gorge trailhead to just past Alberta Falls. Once I hit the North Longs Peak Trail to Boulder Brook trail I only came across 2 people. Both of them were on the lower Boulder Brook trail.
I would call this an easy hike (unless you struggle with knee issues).

3 months ago

Needed to put in a quick elevation hike and discovered this by accident. Would agree with previous reviewer. We went up for just and hour then turned back when we hit some snow. The numerous waterfalls is what this one is all about.

9 months ago

Very rocky and wooded trail where you get some clearings for great views, creek crossings and very few people if you want to get away from the masses. Looked for wildlife but didn't see anything.
We took our time on the way back and relaxed a few times besides the creek and put our feet in the freezing water at one point.
Enjoyed the solitude and peacefulness of this trail.