Turtle lake is about 20 acres about 10 miles north of St. Maries Idaho. There is no boat launch at this lake... One can access the lake for fishing or kayaking via bank access off of road NF-50. This lake is located right off the St. Joe River. Directions from road 50: When you see this lake proceed to the turnout area. This is the place to park. There is no boat launch but one can launch a kayak/canoe from the shore.