Alma Lake, located in North-Central Wisconsin in Vilas County, near the town of St. Germain, is a small 57.7-acre (233,500 sq.

[3] Alma Lake has one public boat landing located on Red Oak Road, off Birchwood Drive.

Each business developed a sandy beach on their shorelines for guests; and Red Oaks Resort also operated a small boat livery.

[6] Alma Lake has relatively clear, blue water, with Secchi disk depths averaging 3.6 meters (11.9 feet).

[4] Secchi depths in Alma Lake have historically been highly correlated with the amount of chlorophyll-a in the water.

[2] Alma Lake has not been invaded by zebra mussels due to its pH of 6.8 and its very low concentration of calcium.