Lake Mary Ronan, Montana

Lake Mary Ronan is a freshwater lake in Lake County in western Montana and is managed in part for recreation through a state park. The lake and its shoreline provide camping, boat access and angling opportunities.

Facilities at the state park include a campground and boat launch; the lake is commonly used for trout fishing and small‑boat recreation. The surrounding landscape is a mix of open rangeland and forested slopes.

The lake is managed for public recreation and conservation under Montana state authorities and is a local destination for residents and regional visitors seeking fishing and camping.

It lies in western Montana’s Lake County in a rural area of lakes and rolling hills, accessible by local roads from nearby small towns and communities.

• State park facilities: The site is managed as Lake Mary Ronan State Park, which provides camping, a boat launch and basic visitor facilities oriented to angling and boating.

• Plan an early‑morning visit for calm water and best fishing conditions; Lake Mary Ronan State Park (north shore) has the main campground and boat launch that provide the most direct lake access.
• Use the park's designated boat launch and campground facilities rather than informal shorelines - the park provides the established access points for boats and anglers.
• Avoid long holiday weekends if you want solitude; weekdays and early mornings are least busy for both camping and launching boats.