Mildred Lake is not located in Mississippi, but rather in Wisconsin. Mildred Lake Boat Ramp can be found in the Chequamegon-Nicolet National Forest, located in the northern part of the state in Price County.
According to the official website of the Chequamegon-Nicolet National Forest, the Mildred Lake Boat Ramp provides access to Mildred Lake, a 191 acre non-motorized lake. The boat ramp is suitable for small watercraft such as canoes, kayaks, and rowboats.
As for the size of the ramp, no specific dimensions were given on the website. However, it is noted that the ramp is made of concrete and is located in a remote area with limited parking. It is recommended to only use the ramp during daylight hours and to be cautious of any hazards in the water.
In terms of the latitude and longitude provided in the question, they do correspond to the location of Mildred Lake Boat Ramp in Wisconsin.
North Branch (Sections 19/30 Line) To Unnamed Creek In Sec 4, T37N, R13E
Main Branch--Headwaters To Forest Road 2174
Headwaters To Footbridge
Footbridge To Forest Road 144
Unnamed Creek To Forest Boundary In Sec 14, T37N, R13E
North Branch--Origin In Sec 10, T38N, R13E To 1/4 Mile West Of Highway 55