Big Portage Lake is a 586 acre lake located in Vilas County. It has a maximum depth of 40 feet. Visitors have access to the lake from a public boat landing. Fish include walleye, largemouth bass, smallmouth bass and panfish. According to the Wisconsin DNR, smallmouth bass and walleye are common in this lake. Largemouth bass and panfish are listed as present. The lake’s water clarity is very clear.