Lake Mary Ronan, Montana
Lake Montana reservoir popular for fishing and recreation
A small Montana reservoir with campgrounds and trout fishing. Anglers and small‑boat users visit for summer camping and quiet shoreline access.
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.
Tips for Visiting Lake Mary Ronan, Montana #
- 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.
Best Time to Visit Lake Mary Ronan, Montana #
Summer (June-September) is the best time for outdoor recreation and reliable access.
Weather & Climate near Lake Mary Ronan, Montana #
Lake Mary Ronan, Montana's climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with mild summers (peaking in August) and freezing winters (coldest in January). Temperatures range from -9°C to 26°C. Moderate rainfall (533 mm/year).
January
January is the coldest month with highs of -1°C and lows of -9°C. Moderate rainfall (52 mm).
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February
February is freezing with highs of 2°C and lows of -7°C. Moderate rainfall (38 mm).
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March
March is cold with highs of 6°C and lows of -4°C. Moderate rainfall (38 mm).
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April
April is cold with highs of 12°C and lows of -1°C. Moderate rainfall (39 mm).
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May
May is cold with highs of 17°C and lows of 3°C. Moderate rainfall (59 mm).
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June
June is cool with highs of 21°C and lows of 7°C. The wettest month with 62 mm of rain.
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July
July is cool with highs of 25°C and lows of 9°C. Moderate rainfall (35 mm).
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August
August is cool with highs of 26°C and lows of 8°C. Moderate rainfall (38 mm).
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September
September is cool with highs of 20°C and lows of 4°C. Moderate rainfall (39 mm).
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October
October is cold with highs of 13°C and lows of 0°C. Moderate rainfall (32 mm).
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November
November is freezing with highs of 4°C and lows of -4°C. Moderate rainfall (47 mm).
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December
December is freezing with highs of -1°C and lows of -8°C. Moderate rainfall (54 mm).
