Peak L - Gore Thumb - M - N - O
Peak L > Gore Thumb > Guyselman (M) > Peak N > Peak O
Date: 8/22/2021
Partner: Heather Ryan
Trailhead: Brush Creek (4x4 Required)
Summits: Peak L, Gore Thumb, Guyselman Mtn, Peak N, Peak O
Max Difficulty: Low 5
Distance: 20 miles
Elevation Gain: 6900ft
Duration: 15hrs 50min
GPX
Peak L 14ers.com Page
Gore Thumb 14ers.com Page
Guyselman 14ers.com Page
Peak N 14ers.com Page
After receiving the beat down of a lifetime attempting to ski Peak L(see trip report), I was excited for the chance of redemption in the Upper Slate. I was also a little nervous as our plan was no slouch... not even close. It covered 20+ miles, 7k of vert, low 5 cruxes and plenty of route finding. Redemption was not guaranteed and with Peak L being my final ranked Gore 13er, there was some skin in the game. Our goal was to finish before dark without being too beat up. Good luck!
The weather forecast was for a perfect Colorado bluebird day. So, we were surprised to wake up to dark clouds and wind in the morning. By the time we reached Upper Slate Lake the weather had not improved. The clouds were dark and moving in fast above the peaks. I was cold eating my sandwich at the lake.
As we climbed Peak L, I was thinking that it might be the only summit in the cards for the day. Heather was having none of that. When we reached L's summit, the clouds no longer looked so dark, and the incoming weather didn't look too bad. Things were clearing up! I had mapped out a couple of bail points between L and O in case weather deteriorated. So, with big smiles and high stoke, we pulled the trigger and embarked on our journey to Peak O. The day went off without a hitch!
Much thanks to Brent Herring for input and beta on this route.
Timeline:
- Start at Brush Creek TH: 4:00am
- Upper Slate Lake: 8:00am
- Peak L: 10:45am
- Gore Thumb: Noon
- Guyselman: 1:15pm
- Peak N: 2:50pm
- Peak 0: 4:10pm
- Lost Lake: 6:30pm
- Brush Creek TH: 7:50pm
20m - 6900ft - 16hrs
![Lmno 02]()
We were rewarded with stunning sunrise light after starting in the dark
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Upper Slate Lake and morning light on Peak Q (The Prisoner)
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Above Upper Slate - We crossed the creek below the waterfall and made our way to the base of Peak L
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Paying no attentin to the Ps and Qs, Heather gets started on the blocky ascent of L
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Ripsaw feeling a tad moody
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Ascending L with the RST ridge behind and XYZ just a little further
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ahhhh... we are going up there!
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Find the cracks between the slabs to keep it to class 3/4
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From here we down climbed to the base of the final pitch
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"Crab Walk This Way" - Down climb before L's final pitch
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Peak L (The Necklace) and 'South America' Lake from the Q-R saddle (earlier trip)
Peak L and Friends from Peak Q (earlier trip)
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Peak Q from high on Peak L
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Our day was just getting started after summitting Peak L. L was my final ranked Gore 13er
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We were pretty excited to begin the traverse to Peak O. Gore Thumb here we come!
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L is for Luego Peak L
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Identifying the Gore Thumb was a challenge. I think it is the one on the far right in this shot. Having a GPS way-point was helpful
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Thumb bound with Ripsaw views behind
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Peak L's north ridge
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Bypassing a tower or two
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The Gore Thumb's west face
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We wrapped around and climbed the Thumb's class 4 north ridge
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Alex on the Thumb - Ripsaw in the distance
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Looking north from the Thumb's summit. Land of Towers - Guyselman (Peak M) on the left
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Peak L from the Gore Thumb
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With time on our mind, we bypassed the remaining towers. Next stop Guyselman(Peak M) - Gore Thumb behind
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Powell(R) and Ripsaw - 'The Elephant' in the forefront
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The Gore Thumb and Peak L
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Peak L and the ridge of towers - Close to Guyselman's summit
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Descending Guyselman was a little tricky. We found a steep but good route down the west ridge - then partially descended a gully to the northeast - then a ramp on the left back to the ridge towards N
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The ridge to Peak N
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Fun class 3 on closer to Guyselman - class 2+ closer to Peak N
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Heather and Guyselman's impressive north face
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Powell and Ripsaw
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Guyselman and Peak L from Peak N
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Peak N summit selfie: Feeling strong for the last technical section to Peak O
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Alex climbing a tower en-route to Peak O
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Peak O on the left
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A spicy down climb off the tower - then a few more steeper climbs and we are home free... well... kinda
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Looking back to Peak N from high on Peak O
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Trying not to think about the heinous bushwhack to Lost Lake that awaits us.
![Lmno 48]()
Black Lake, Blue Lake, then Green Mountain Reservoir
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With the classic eastern Gore bushwhack behind us, I couldn't contain the joy upon reaching the lilys of Lost Lake
![Lmno 50]()
Appreciating the 3 miles of cruiser trail from Lost Lake back to the trailhead













































