The Fuji Mountain Trail begins on the west side of Forest Road 5897. It follows a long switchback up a steep ridge, then levels off and passes through rolling country with a few short pitches.
The trail passes within view of Birthday Lake and crosses the South Waldo Trail #3586. At this point the trail climbs up a slope, then drops down and traverses a slope to a trail junction.
The right fork leads to the top of Fuji Mountain and the left fork leads down 0.25 mile to Forest Road 5883. The trail gets steeper and much more rocky above the South Waldo trail and there are some amazing views on the way up as well as from the top.
Parts of this Trail description from the US Forest Service website.