Bolton Lake is a lake in the Moose River drainage basin in Timiskaming District, Ontario, Canada. It is about long and wide, and lies at an elevation of , west southwest of the community of Matachewan. The primary inflow is an unnamed creek from Winding Lake, and the primary outflow is an unnamed creek to Lloyd Lake, which eventually flows into the Grassy River, and then the Mattagami River into the Moose River.
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