It flows southwest into the Lillooet River approximately 95 km (59 mi) northwest of the village of Pemberton.

They are related to volcanism of the Mount Meager massif which last erupted about 2,350 years ago.

[2] The hot springs issue from Mesozoic basement rocks near volcanic vents.

[3] Keyhole Hot Springs address: 42.5 km Upper Lillooet FSR.

The zone above the Hot Springs is a designated "Ungulate Area" for breeding & birthing of Mountain Sheep and Goats.