Mt. Mamma

Route: From Boulder down North Ridge
Posted On: 5/9/2026, By: MMAfightingClimber
Info: A fair bit of snow on the ridge. But was able to rock hop a decent amount of it. We took the north ridge down (not northeast ridge), I would advise not to do this route.

Snow on the ridge toward the sub peak to the north. You can rock hope a little bit of it. It goes at class 2+.

We descended the north ridge to a flat area but it gets very steep around 12,500ft and it’s a not pleasant steep talus decent with a very steep and loose section from 11,400-11,200ft. Also a bit pleasant bushwhack down to the road from treeline. Talus field in treeline as well. It’s better to just descend to Baldwin gulch I think. 

Route: Baldwin drainage
Posted On: 11/8/2025, By: Outbounder
Info: The road leading up to Boulder is covered in thick ice in many places. I doubt you'd be able to get a car up the road. Hiking a few sections of the road forced you to walk on the very edge to avoid thick black ice (or slide down it as I did on the descent). The section through the woods is snowy (about ankle deep). Above tree line, the peaks are very dry with avoidable intermittent snow. Princeton and Antero are looking dry. 

Route: Traverse From Grizzly to Boulder
Posted On: 6/29/2024, By: QuietBear
Info: The entire Baldwin Cirque is in summer conditions.

Rock quality is solid near Grizzly and deteriorates towards Mamma. Quality on Mamma is mixed; similar to the Bells. Do not underestimate the length or sustained scrambling required on the ridge between Grizzly and Mamma. Several reports say "Easy Class 2" or "a nice ridge run". You will not be running on this ridge, and only some sections are class 2. Especially with spring snow blocking some bypasses, many parts including the knife edge section are difficult 3 with one or two class 4 moves with current snow conditions.

Traverse to Boulder is beautiful and truly easy class 2 ridge running.

There is an abundance of muddy, slick, and sinking ground at lower elevations, especially near the lakes and willows. The creek is running very strong and Baldwin Creek 4x4 Road (Forest Service Road 277) has a good amount of water running over it in places. Mostly 1-2 inches, but perhaps 8-10 in one spot. Mosquitoes are in full bloom in the forested areas. Getting out of my car for a second resulted in 10-15 intruders. 

Route: From Baldwin Gulch via Boulder
Posted On: 2/24/2024, By: daway8
Info: Four of us did Boulder Mountain and Mt. Mamma from Baldwin Gulch TH retracing over Boulder on the way back. The two in our party on skies (kyrawhitworth and RyanOlsonDDS) had on skis with skins and ski crampons right from the start. Me and yaktoleft13 booted until the first ice flow then wore snowshoes to treeline. First ice flow is currently the worst but snowshoe crampons and ski crampons worked well for our team members. Skiers stashed skies a little below treeline (started getting too rocky for them) and snowshoes stashed at treeline. Everyone booted the rest of the day until returning to the stashes. Bomber trench in place now - portions of which we managed to poach the remnants of someone else's old track - thank you whoever you were! Fairly windblown above treeline but just enough snow on the narrow parts off there ridge to make it dramatic (though can bypass down to the left if you don't like snowy exposure like I do). Stellar day with blue skies. Wind was just enough to be annoying but not overly problematic. 

Route: From Baldwin Gulch
Posted On: 12/29/2023, By: Will_E
Info: Road to Antero was well trenched, I didn't need snowshoes until branching off of 277, from there the snow was deep and soft until just past treeline when I started up the ridge. Ridge was easy, mostly rock hopping to summit. Nice day, very warm and little wind. 

Route: From Antero Rd
Posted On: 8/10/2023, By: tefensmom
Info: The Mamma summit register needs a new pen/pencil if anyone is headed up soon. The register for Boulder Mtn has a pencil. Both have wet paper. 

Route: Baldwin Gulch Loop
Posted On: 6/28/2023, By: JasonKline
Info: I followed the loop from

https://www.14ers.com/php14ers/tripreport.php?trip=17134

which began at Baldwin Gulch, ascended the northeast slope of Boulder, traversed to Mamma, traversed the ridge north of Mamma, them descended northeast to Baldwin Gulch. The route was summer conditions except

(1) The east side of the ridge north of Mamma still held snow. This was easily avoided by staying on ridge proper or the west side of the ridge.

(2) While descending northeast of the north Mamma ridge, there was a brief (100 feet or so) stretch of unavoidable snow at treeline. It was simple enough to walk through the snow safely without any equipment.

It was pretty windy from Boulder to the end of the ridge north of Mamma.

The descent down to Baldwin Gulch indeed contains sections that are both pretty steep and covered in slick pine needles. It was definitely shorter than returning back over Boulder or descending to the east, but it was slow going and some portions of the descent were unpleasant "class 3 grass." 

Route: From Boulder Mountain
Posted On: 6/24/2023, By: SionaRW35
Info: Summer conditions. No pencil in summit register. 

Route: 277 -> East Ridge
Posted On: 6/17/2023, By: LetsGoMets
Info: Drove up Baldwin Gulch Road to the 277/278 split at the creek crossing. Hiked in 277 to the mine and then climbed up to the east ridge of Mamma. Couple inches of snow fell the night before made for slick rocks up to the summit. On the way down, got hammered with snow so there is another inch or so to add (and bailed on Boulder as a result). Still did it in trail runners and would do it again. Some snow fields to cross near the mine. Didnt use traction. 

Route: Baldwin Gulch
Posted On: 6/3/2022, By: gcook33
Info: 95% dry. Followed the road from the 2wd parking almost all the way to the summit, easy hiking. Only a few small snowfields high in the basin but nothing consequential. 13.5mi 4300' 

Route: Ridge from Boulder Mountain
Posted On: 6/16/2021, By: desertdog
Info: Hiked the ridge from Boulder Mountain. No snow. Summer conditions. Smoke was not too bad. If you have a decent 4wd you can easily drive up and park at the blocked road past 279. This saves 1.5 miles each way. As described in several trip reports take the (blocked) road past 100 yards past 279 as a short cut. 

Route: From Boulder mtn
Posted On: 11/2/2020, By: Trotter
Info: Fairly windblown ridge from Boulder, and also descent to the unnamed mine road south of Mt Mamma. Then about 4-6 inches of snow on road, with holes and rocks under it. A few clear areas but not many. 

Route: Baldwin Gulch
Posted On: 10/12/2020, By: angry
Info: Dry to summit. However, it was snowing on the descent. Summit register needs paper. 

Route: From Boulder Mtn
Posted On: 6/6/2020, By: RobLowe
Info: W/ Boulder Mtn. No snow up Boulder. Some snow on Mamma heading down Baldwin Gulch. Very windy but forecast is better for tomorrow. Road in Baldwin Gulch is in great shape. 

Route: Baldwin
Posted On: 3/24/2019, By: cottonmountaineering
Info: Nice trench up to 4wd trailhead, there are debris fields in the usual spots, but a lot deeper than other years. snow is crusty below treeline. Above treeline there was excellent snow and maybe 6" of fresh stuff which made the ski down a lot of fun.