Vesper Peak remains hidden from view for most of the climb, but you have plenty of other things to occupy your interest.

I've only done this climb in August, but it should be feasible any time the road is accessible and the avalanche danger is low.

Ascent

Find the Sunrise Mine Road and drive to the trailhead at the end of it.

Follow the trail through woods, across a small river, and then up a brushy hillside. Eventually the trail will cross over into a hanging valley.

Proceed up the valley to Headlee Pass. The most common route-finding problem is failure to identify the correct pass. It is very near (but not quite at) the upper end of the valley.

Climbing to the pass is difficult. Expect either steep snow or loose, sandy soil. From the pass you can see Vesper.

On the other side of the pass, the trail descends slightly before crossing around Sperry. Then it ascends again and reaches the end of a hanging glacial cirque.

Cross the stream at the outlet of the cirque and ascend the snow to the summit. (When the snow is gone the trail is described as "easy slabs.")

The summit is sheltered and comfortable, a fine place to enjoy a sunny day. There is big exposure off the north side, and an unusual view of Big 4 to the west.

Descent

Follow the climbing route.

It is possible to traverse around the top of the cirque and climb Sperry.