The Clark Fork River corridor at Greenough Park offers one of Montana's most accessible urban riverside recreation areas, tucked along the northern edge of Missoula's Rattlesnake neighbourhood. Greenough Park is a linear wooded preserve along Rattlesnake Creek, which flows into the Clark Fork — and it is the broader Clark Fork river banks immediately downstream that serve as Missoula's primary summer swimming and sunbathing destination. The Clark Fork is a mountain river rather than a lake, so the 'beach' here consists of wide gravel bars and rounded cobblestone banks formed by the river's current. The water is clear and snowmelt-fed, running over smooth pale stones in shades of grey and tan. In June and early July, the river runs high and fast with spring snowmelt, making swimming in the main channel inadvisable. By mid-July through late August, levels drop and the flow mellows substantially, exposing wide gravel bars used extensively by Missoula residents for sunbathing, wading, dog swimming, and relaxed afternoon gatherings. The stretch from Greenough Park connects to the Kim Williams Nature Trail along the Clark Fork — a flat, paved multi-use path extending for miles that links multiple gravel bar access points. The setting feels surprisingly natural despite its proximity to the city, with cottonwood and willow canopy overhead, osprey circling above, and river otters occasionally seen from the banks. No formal amenities exist at the river — no restrooms, food, or lifeguards — but downtown Missoula is a 15-minute walk away with full dining, grocery, and coffee options.
Amenities
- River access
- Walking trails
- Picnic areas
- Dog-friendly
- Fishing
Good to know
- Best for
- dog-owners, families, swimmers, solo, photographers
Location
Greenough Park, Carter St, Missoula, MT 59801
46.8760, -113.9840 View on map
Highlights
- Urban river gravel bars used by Missoula residents for sunbathing, wading, and gathering
- Kim Williams Nature Trail linking multiple Clark Fork river access points along a cottonwood corridor
- Dog-friendly environment — dogs swim freely in the river alongside people on summer afternoons
- Osprey and occasional river otter sightings from the willow-lined banks
- Free access walkable from downtown Missoula's restaurants, university district, and Higgins Avenue
Tips for visiting
- Check the Clark Fork river flow before swimming — flows above 3,000 cfs make wading hazardous; current data is available at waterdata.usgs.gov
- Mid-July to late August offers the best conditions: lower flows, warm air, and fully exposed gravel bars
- Water shoes are useful on the cobble bottom, though many locals wade barefoot on the smoother sand patches in calmer sections
- The gravel bars draw heavy use on warm summer afternoons; arriving before noon gives the best choice of spot and shade along the cottonwood edge
- Keep dogs under voice control near other swimmers — river current can surprise animals unfamiliar with moving water
When to visit
Mid-July through late August when river levels are lower and the current is manageable for wading and swimming in calmer side channels. Avoid May through mid-July when snowmelt keeps flows high and the main channel is hazardous.
Frequently asked questions
Is the Clark Fork River safe to swim in Missoula?
Swimming is manageable in mid-to-late summer when river levels drop. The main channel carries fast current year-round; calmer side channels and pools near gravel bars are safer for wading and casual swimming. Visitors should always check current flow conditions before entering the water.
Are there lifeguards at the Clark Fork gravel bars?
No lifeguards are stationed at any Clark Fork river access point in Missoula. Swimmers enter at their own risk, and children should be closely supervised near the water at all times.
Is there parking near Greenough Park and Clark Fork access?
Limited on-street parking is available in the Rattlesnake neighbourhood near the Greenough Park entrance on Carter Street. The site is also easily reached on foot or by bicycle from downtown Missoula in roughly 15 minutes.
Are dogs allowed to swim in the Clark Fork?
Dogs are welcome at river access points and frequently swim alongside people. Standard leash laws apply on park trails; at open gravel bars dogs often go off-leash. Check posted signage for any current seasonal rules.
What Clark Fork access is closest to downtown Missoula?
Caras Park along the Clark Fork riverfront in central Missoula provides the nearest formal river access. Greenough Park is a 10–15 minute walk north and offers quieter, more natural sections of bank.