Redfish Lake Swimming Guide
Can you swim here?
YES
Best swimming season
June through September
Summer water
55°F
Water clarity
Clear
Lifeguards
No
Cost
Free
Difficulty
Moderate
Location type
Remote
Public swimming
Yes
About this lake
About Redfish Lake
Redfish Lake stands as one of Idaho's most stunning alpine swimming destinations, cradled in the Sawtooth Mountains with breathtaking 10,000-foot peaks reflecting off its pristine surface. This glacier-fed mountain lake captivates swimmers with its striking deep crimson hue, created by suspended sediment and minerals that give the water its distinctive character. The lake spans 2,700 acres of pristine wilderness, surrounded by dense coniferous forests and dramatic granite cliffs that create an almost otherworldly atmosphere. The crisp mountain air, combined with the lake's natural beauty, makes swimming here a truly immersive experience in Idaho's alpine landscape. Wildlife enthusiasts frequently spot osprey, bald eagles, and mountain goats along the shoreline, adding to the area's ecological richness. The remote location ensures the lake remains relatively uncrowded despite its remarkable appeal. Practical tips: Arrive early during peak season to secure parking and enjoy calmer morning waters before afternoon winds pick up. Bring thermal swimwear or a wetsuit, as the mountain water remains cold throughout the year.
About This Lake
Swimming Conditions
Redfish Lake's water clarity ranges from clear to moderate, with visibility typically between 15-30 feet depending on season and recent weather. The alpine lake maintains frigid water temperatures year-round, averaging 52-58°F during peak summer months, requiring swimmers to acclimate quickly and consider wetsuits. The lake bottom slopes gradually from shore, reaching depths of over 300 feet in the center, with safest swimming occurring in designated areas near the beach within 30-50 feet of shore. Currents remain minimal in protected coves, though afternoon winds can create small chop on the main lake. The deep glacier-fed waters stay cold even in late summer, demanding respect and caution. No lifeguards patrol the beach, making self-supervision essential. Strong swimmers should venture beyond the shallow zone, while families with children should remain in designated swimming areas. Afternoon winds can create choppier conditions, so morning swims offer calmer waters. Always use the buddy system and avoid swimming alone. Check weather conditions before entering, as sudden temperature changes can occur.
Visitor Information
Redfish Lake is located 45 miles south of Stanley, Idaho, accessible via Idaho Highway 75 through the scenic Sawtooth Valley. From Boise, the drive takes approximately three hours via Highway 21. The main beach area offers free parking for approximately 150 vehicles, with overflow parking available during peak season. Full-service facilities include restrooms, picnic areas, and boat launch facilities maintained by the Forest Service. No food services operate at the lake itself, so pack provisions or purchase supplies in Stanley, 45 minutes away. Nearby accommodations range from rustic cabins and Forest Service campgrounds to the upscale Redfish Lake Lodge with full amenities. The best visiting season runs from June through September when snow melts and weather permits comfortable swimming. July and August offer warmest water temperatures, though crowds increase accordingly. Spring and fall visits provide solitude with colder water conditions. Winter access depends on snowfall and road conditions. Arrive early to secure parking, especially weekends.
Lake Highlights
Lake Details
| State | Idaho |
| Water Type | Lake |
| Water Clarity | Clear |
| Water Temperature | 55F |
| Calmness | Calm |
| Difficulty | Moderate |
| Entry | Free |
| Lifeguards | No |
| Sandy Beaches | 1 sandy beach |
| Piers | No |
| Parking | Free parking for 150 vehicles with overflow during peak season |
| Remoteness | Remote |
| Season | Summer |
| Best Months | June through September |
| Coordinates | 45.1531, -115.2606 |
Plan Your Visit
Choose how much time you have and we will show you the best way to experience Redfish Lake.
Alpine Adventure: A Perfect Day at Redfish Lake
Begin your day by arriving early at 7 AM to secure parking and enjoy the pristine morning light reflecting off the lake's crimson surface. Spend the first hours exploring the main beach, swimming in designated areas, and acclimating to the cold alpine waters. Pack a substantial picnic lunch to enjoy at the scenic picnic areas while observing osprey and bald eagles overhead. Afternoon activities include hiking surrounding trails through the Sawtooth National Recreation Area, photographing the dramatic mountain peaks, and relaxing on the beach. For more adventurous swimmers, early afternoon offers the calmest water conditions before afternoon winds develop. End your day with a sunset view from the shoreline, capturing the mountains' changing colors. Depart by 5 PM to ensure safe daylight driving on the mountain roads back to civilization.
Mountain Escape: Redfish Lake Weekend Getaway
Day 1
Friday evening or Saturday morning, drive to Redfish Lake arriving by 10 AM. Spend your first day swimming in the morning, then exploring nearby trails including the challenging hike to Sawtooth Lake with its alpine vistas. Return to the lake for an afternoon swim and evening dinner at Redfish Lake Lodge. Enjoy stargazing at night, experiencing the remote mountain location's incredible dark skies and constellation views rarely seen in populated areas.
Day 2
Sunday morning begins with an early breakfast followed by a rejuvenating cold-water swim in the crisp mountain air. Spend midday exploring additional trails, visiting nearby Pettit Lake, or relaxing at the beach with a good book. Consider renting a kayak or canoe to explore the lake from a different perspective. Pack a substantial picnic lunch and spend the afternoon wildlife watching and photographing the dramatic alpine scenery. Depart by 3 PM for the scenic three-hour drive back to Boise.
What to Bring
📸
Swam at Redfish Lake?
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Frequently Asked Questions
Is Redfish Lake safe for swimming?
Yes, Redfish Lake is generally safe for swimming in designated beach areas, though no lifeguards are present so swimmers must exercise caution. The buddy system is recommended, and swimmers should respect the cold water temperatures and avoid venturing into the deepest sections without proper preparation. Always check weather conditions before entering the water.
What is the best time to swim at Redfish Lake?
The best swimming season runs from June through September, with July and August offering the warmest water temperatures around 55-58°F. Morning hours provide the calmest water conditions before afternoon winds develop. Early June and September offer beautiful scenic conditions with fewer crowds and slightly cooler water.
Is there an entry fee at Redfish Lake?
No, there is no entry fee at Redfish Lake. Parking is free for all visitors at the main beach area, making it an affordable alpine destination. Forest Service day-use areas may have minor fees in some cases, but direct beach access remains free.
What facilities are available at Redfish Lake?
Redfish Lake offers restrooms, picnic areas, and boat launch facilities maintained by the Forest Service. No food services operate directly at the lake, so visitors should bring provisions or purchase supplies in nearby Stanley. The Redfish Lake Lodge provides restaurant dining and accommodation options.
Can you camp near Redfish Lake?
Yes, multiple camping options surround Redfish Lake including Forest Service campgrounds and private campgrounds throughout the Sawtooth Valley. The Redfish Lake Lodge offers cabin accommodations for those preferring indoor lodging. Reservations are recommended during peak summer season.
Quick Info
| State | Idaho |
| Water Temp | 55F |
| Clarity | Clear |
| Difficulty | Moderate |
| Entry | Free |
| Lifeguards | No |
| Parking | Free parking for 150 vehicles with overflow during peak season |
| Best Time | June through September |
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