The Desolation trail is a 17.5 mile (one way) trek that starts in Millcreek Canyon and ends at Desolation lake. Although I would have loved to have hiked the whole thing time would not permit. Our destination was a Valley overlook about 2 miles from the trailhead. The trail starts to the west of the parking area. After a short distance the trail forks with the Desolation trail heading to the right and the Thayne Canyon trail going left.
The first part of the trail is very wooded and offers a lot of shade. after about a 1/4 mile you hit the first set of switchbacks. The trail was fairly easy but had a very steady elevation gain. After the first set of switchbacks the trail heads back to Thayne Canyon where the Two trails meet up again. (We took the Thayne Canyon trail on the way down.) Desolation trail then heads west and gradually makes its way up the mountainside. There is one switchback before a longer stretch of the trail takes you to the last set of switchbacks that takes you over the ridge line to the Valley overlook.
First look at the valley
A view of Grandeur Peak to the north
The desolation trailhead is located at the South Box Elder Picnic area, 3.2 miles up the canyon just east of the Millcreek Inn.
View Salt Lake overlook-Thayne Canyon in a larger map