Indrahar Pass is the high mountain goal beyond Triund, crossing the Dhauladhar range above the Kangra Valley. The route is much more serious than the Triund walk, with snow possible on the upper slopes and a remote finish toward Lamu.
Treat it as a proper alpine trek rather than a casual outing from McLeod Ganj. Most visitors arrange a guide or join an organized trek, especially outside the easiest summer conditions.