This is best as a snowshoe or ski trip, IMO. It's hard to target this when there are so many more interesting peaks nearby.
Straight up from Grandjean road with no snow shoes until 8000 ft. Saw some type of tower (weather station?). Saw a Golden Eagle and deer. Per "History of the Boise National Forest 1905-1976" it is named after General Zumwalt, as the page says. Zumwalt's grave is near Graham.