Pets allowed
Elevation Gain
5,700.00 ft (1,737.36 m)
Trail type
17.20 mi (27.68 km)
Please respect the outdoors by practicing Leave No Trace. Learn more about how to apply the principles of Leave No Trace on your next outdoor adventure here.

With over 600 miles of trails and 500,000 acres of wilderness land, the Trinity Alps form an alpine wonderland in far northern California. The heavily forested west side of the alps form the Green Trinities, and the rugged granite peaks in the heart of the range make up the White Trinities. This trip takes you to the crest of the eastern portion of the Trinity Alps: the peridotite-stained Red Trinities.

Long Canyon is the shortest of several routes that can take you to the Four Lakes Loop. Six miles of steady uphill hiking will take you from the trailhead to Bee Tree Gap at 7,560 feet and then on to Deer Creek Pass, the high point of the trail at 7,760 feet. This section alone makes for a worthwhile trip. The trail begins under the cover of mature Douglas fir and incense cedar trees before breaking out into subalpine meadows after about 2.5 miles. These meadows will provide a full palette of color when hiked in the summer during the wildflower season. The geology of the area will add to the color palette with red and white stone spires competing for your attention.

Once you make it to Deer Creek Pass the first of the four lakes appears (Deer Lake, of course). The 5.2-mile Four Lakes Loop connects here and begins its circumnavigation of Sligo Peak. After skirting the periphery of Deer Lake's bowl, Summit Lake appears with its own short spur trail. Continue west and you will eventually descend toward the jewel of the four lakes, Diamond Lake. When you make it to the eastern shore of the lake and look west, the lake forms an infinity pool with the White Trinities as the backdrop. Flat ground for camping can be found on the north side of the lake.

Logistics + Planning

Preferable season(s)




Parking Pass

Not Required


Lightly visited. Big views. Summer wildflowers. Swimming.


Strenuous. Dirt road approach.

Trailhead Elevation

3,760.00 ft (1,146.05 m)


Big vistas
Geologically significant

Typically multi-day


Suitable for



Nearby Adventures


Went July 10-12, 2018. Gorgeous, dramatic area and awesome camping and swimming on Summit Lake. Hike was unexpectedly strenuous compared to the other hikes I've done in the area (Caribou Lake, Canyon Creek Lakes), but still is a definite summer highlight. Beware of some pretty defensive colonies of biting flies right at the craggy summit of Siligo Peak. Still worth the scramble though!
Basically no snow on the trail, tons of bugs but no mature mosquitoes just yet (we went June ~17-19). Gorgeous out there, and the flowers are still looking awesome. I highly recommend dropping packs to run up Siligo and see the whole area.
Yes still snow in several portions of the final access to Deer Pass and on the way between deer lake and Summit lake- just went there May 27-28.
Very beautiful tho: one for the memory books. Anemones out everywhere, and flowering dogwood on the initial portions
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