Lake Mary Ronan State Park is a public recreation area located seven miles (11 km) northwest of the Flathead Lake community of Dayton, Montana. The state park occupies 120 acres (49 ha) on the east side of 1,500-acre (610 ha) Lake Mary Ronan. The lake is 47 feet deep at its deepest spot and is known for kokanee salmon and yellow perch. Twenty-five campsites and a boat ramp are found in the park.

Fishing

Fishing at Lake Mary Ronan is a popular activity, the lake is stocked for continued enjoyment.

Fish species within the lake

Species	Family	Class	Native to MT
Kokanee	Trout	Coldwater	Introduced
Largemouth Bass	Sunfish	Warmwater	Introduced
Pumpkinseed	Sunfish	Warmwater	Introduced
Rainbow Trout	Trout	Coldwater	Introduced
Westslope Cutthroat Trout	Trout	Coldwater	Native
Yellow Perch	Perch	Warmwater	Introduced