Native Americans also exercise their federally protected treaty rights to spearfish on the lake.

[2] Native American tribes spear fish in North Twin Lake and elsewhere in Vilas county based on their federally protected treaty rights.

[3][4] The spear fishing activities are often a source of friction between Native Americans and local residents.

[3] Gangster Island is located in the southwest portion of North Twin lake (originally known as Big Twin Lake) in the town of Phelps in Vilas County, Wisconsin.

[5] According to real estate listings the island covers roughly 10 acres (4.0 ha).