This is actually a report on an off-trail approach to Mt. Townsend. The basic off-trail route follows a north-south ridge to its top, where it meets an east-west ridge, which runs to Townsend's summit. This route takes the north side of the valley, opposite the regular trail that stays more to the southern side in the upper end.
We left the upper parking lot and took the trail to its intersection with the Wilderness Boundary. This is about one mile from the trailhead; there's a sign posted on a tree on the north (right) side of the trail. About 20-30 feet beyond the tree, the trail curves to the right and levels out some as it crosses a slight north-south ridge.
We left the regular trail at this point and headed northwards up the ridge. Our bearing was about 345 degrees. We pretty much just followed the crest of this ridge until we hit the east-west ridge. From there, we turned west (270 degrees) and traversed just below the ridge. You probably want to avoid the very top of this ridge: it has significant exposure on the north side and a lot of climbing on not particularly good rock. We were able to circumvent most rock outcroppings.
We followed deer trails as much as possible, which was a big help. There are a few spots on the way up where you have to bushwhack a little bit, but a somewhat meandering course will allow you a fairly clear path most of the way.
You can vary this course by adding more rock, if you're comfortable with the climbing or have the necessary safety equipment.
Even though the valley was socked in with clouds, by using our compasses for bearings, we ended up hitting the regular trail within 100 feet of Townsend's true summit. The lack of visibility made it difficult to gauge our progress as we traversed the upper ridge, but we were never seriously off course. There is a fair amount of scree in varying sizes, which makes walking difficult. I'd recommend helmets for safety. Trekking poles and/or an ice axe would also be helpful.
This was a challenging, but not particularly difficult, route. Our group consisted of Boy Scouts ranging from 12 to 17 years old, and three adults in our early 50's. No one had any significant problems making this climb.