This picture shows most of the
Gallatin Range south of
Electric Peak (not visible here).
Mount Holmes is the highest peak among the group of mountains in the distance on the left-hand side of this picture. Its triangular shape from this angle is distinctive.
I've also posted this picture as the right-hand side of
this panorama.
The photo was taken most of the way up the switchbacks on the south side of
Sepulcher Mountain, mid-June 2008.