🌤 Weather at Cooney State Park by season
| Spring | Summer | Fall | Winter |
|---|---|---|---|
| 19–66 °F | 44–86 °F | 19–74 °F | 10–39 °F |
Each range runs from the coldest monthly average low to the warmest monthly average high in that season (1991-2020 climate normals), measured at Joliet, 10 mi away, elevation 3,838 ft. Conditions at the park can differ from the station, especially where elevation differs — check a forecast before you go.
Cooney State Park is a public state park in Montana near Boyd in Carbon County. Spanning 309 acres and established in 1970, this park offers a peaceful retreat into nature for visitors of all ages.
Quick Facts
| State | Montana |
| Nearest City | Boyd |
| County | Carbon |
| Park Size | 309 acres |
| Established | 1970 |
Location & Getting There
Cooney State Park is located near Boyd, Montana. The park’s coordinates are 45.4403, -109.2147.
Things to Do
Montana state parks offer access to the raw, untamed beauty of the “Big Sky” state, featuring alpine glacial lakes, immense river canyons, Old West ghost towns, and Native American buffalo jumps. Activities are deeply rooted in the wilderness experience: world-renowned fly fishing on blue-ribbon trout streams, hiking and mountain biking in bear country, floating and kayaking crystal-clear rivers, and camping in remote, scenic locations. The parks also serve as unparalleled gateways for wildlife viewing, including eagles, bighorn sheep, and elk.
Best Time to Visit
Summer (late June to August) is the primary window for visiting Montana parks, offering warm days, accessible high-elevation trails, and peak water recreation. Fall (September–October) is stunning with golden aspens and excellent, uncrowded fishing, though snow can arrive early. Winter is long and harsh, closing many park roads, but select parks offer ice fishing and cross-country skiing. Spring is beautiful but often hampered by muddy trails and high, murky river runoffs until late June.
Visitor Tips
Montana residents who pay the $9 state parks fee with their annual vehicle registration enter for free; everyone else pays $8 per vehicle or $4 per walk-in, bicycle or bus passenger per day. Bear safety is critical: carry bear spray, know how to use it, hike in groups, make noise, and strictly adhere to food storage regulations when camping. Many parks have limited amenities (pit toilets, no running water), so prepare for a more rustic experience. Weather can change drastically—snow is possible in the mountains even in July.
Explore More Montana State Parks
Cooney State Park is one of many outstanding state parks in Montana. Discover more parks in our Best State Parks in Montana guide, or use our Park Finder to search by activity, location, or features.
More parks nearby: Greycliff Prairie Dog Town State Park is within about an hour’s drive, while Lake Elmo State Park lies elsewhere in the state.
Camping reservations: Book campsites and cabins for Montana state parks online at montanastateparks.reserveamerica.com.
🐾 Dogs & Pets at Cooney State Park
- Pets allowed? statewide rule
- Pets are allowed at most Montana state parks but must be leashed and not left unattended.
- Leash rule statewide rule
- Leash no longer than 8 feet required, unless otherwise posted.
- Beaches & swim areas statewide rule
- Pets are prohibited from swimming beaches and posted restricted areas.
- Statewide exceptions statewide rule
- Pets prohibited at Frenchtown Pond and Wild Horse Island; kennel service offered during Lewis and Clark Caverns tours; Spring Meadow Lake no pets April 16 - October 14; Lake Elmo has a fenced dog park.
Are dogs allowed at Cooney State Park?
Pets are allowed at most Montana state parks but must be leashed and not left unattended. Individual parks can post stricter rules — check signage on arrival.
Rules verified July 2026 via fwp.mt.gov. More: Montana state parks guide · Dog rules in all 50 states compared
Park Location
Plan your gear for Cooney State Park
From our editorial guides, matched to this park’s activities:
