Halfway Lake Provincial Park is a provincial park astride Ontario Highway 144 in Sudbury District in northeastern Ontario, Canada.

The nearest settlement on Highway 144 is Cartier, about 25 kilometres (16 mi) to the south.

There are a mix of 221 electrical and non-electrical sites in the two campgrounds (namely Hawksnest Campground and Wild Rose Campground), 10 interior canoe-access sites located on Antrim Lake, Bailey Lake, and Trapper Lake, plus an additional five interior hike-access sites located along the Hawk Ridge Trail.

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