Lidar values now complete.

UN 13,015 (formerly UN 13,020 interpolated) near Maroon Lake and Willow Pass has been determined to be no longer a ranked summit per Lidar evaluation, which gives it 292 ft. of prominence. This has reduced the total number of ranked 13ers from 584 to 583. We will be adjusting our list in the near future.


LoJ: #584 (Pre-LiDAR #586) / 13,080' Whale Peak

Range › Front Range
Quadrangle › Jefferson
Summit Location › Peak Route Icon N 39° 29' 39.04", W 105° 51' 59.09" (Not Field Checked)
Neighboring Peaks › Peak Icon Mount Guyot

Peak Summary

Whale Peak is a mostly Class 1 and 2 tundra stroll from Jefferson Lake with no designated trail to assist. Most passenger cars can access Jefferson Lake on a graded dirt road. This is a pleasant and family-friendly hike close to the Denver metro area. Camping is available close by. It's possible to make this a "day-climb" from the Denver area, driving up and returning the same day. Lidar added 2 feet in elevation to this summit.

Whale Peak South Ridge Route

Class 2
Medium Day // Take a Lunch
RT From Jefferson Lake: 9.1mi / 2,380'
  • Trailhead
    • Jefferson Lake TH

      From the Front Range/Denver metro area, head out of town on US285. Drive through Bailey, then over Kenosha Pass, dropping off the pass to the small town of Jefferson. At Jefferson, turn north onto CR54 (aka: the Michigan Creek Road) at the main intersection. The road heads first north, then turns west. In just about two miles from Jefferson, turn north again onto CR37 which is marked for Jefferson Lake. It's another 5.2 miles to the lake on a graded dirt road that most passenger cars can handle. There are two main parking areas at the lake. The USGS Jefferson quad shows a campground at the lake. This appears to be no longer the case, but there are vault toilets.


      There are several fee campgrounds along CR37 heading up to Jefferson Lake. These are "Jefferson Creek," "Aspen," and "Lodgepole." There are also at-large camping spots. Since this is all located close to major metro areas, camp spots fill quickly on summer weekends. Plan accordingly.
    Peak Icon Route Map Photos

    Route Info Whale Peak South Ridge

    Route Description

    Year Climbed: 2007

    Begin by crossing the lake spillway and walking on the west side of the lake. A fisherman's trail of sorts follows along the west shore, climbing over fallen trees, roots, rocks and going up sometimes and dropping down other times. It’s sort of slow going. Near the north end of the lake, an opening in the forest to your left affords an opportunity to depart the now fainter trail and ascend steeply (Class 2) for a while until you clear the trees. The goal is to gain the broad ridge that leads to the unranked "Glacier Peak." Higher up, the slope will begin to relent a little and you can hike through tall grasses and tundra. Keep an eye out for a beautiful hawk that flies in this area. The hiking becomes easy Class 1 and you will make rapid progress over mostly tundra to near the summit of Glacier Peak. Here, you intersect the Continental Divide trail and continue hiking now north and then east over more easy Class 1 tundra toward the summit of Whale. In the fall, the tundra up here is quite colorful. There's a medium-sized rock cairn marking the high point of the broad, mostly tundra and embedded rock summit. It took us just a little over two hours from Jefferson Lake. While taking our lunch on this summit, we were visited by a friendly group of mountain goats who came up quite close to us. Two yearling goats played on the summit cairn, clambering up, then leaping off to clamber back up again. They tarried here for a good ten minutes while we snapped a few dozen pictures.

    For the descent, try heading down the SE ridge toward Pt. 12,733. At the saddle before reaching that point, drop down SW into the Jefferson Lake Fork drainage. This fairly open valley heads south back to the north end of Jefferson Lake. This is a pleasant valley with plentiful signs of elk. At times you pass through forest but it was not difficult at all to get back to the lake. When you do reach the lake, avoid the willows at the upper end. We walked back along the east shore and followed another faint fisherman's trail that again led over various obstacles until you reach the parking area. One way mileage is 5.0 following our suggested route to the summit. If you return as suggested, you'll save about .9 mile.

    Additional BETA

    Links to other information, routes & trip reports for this peak that may be helpful.
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