Bolan Lake, Siskiyou Forest, California, 1919 NARA – Lake Siskiyou, California
Cupressus nootkatensis at Bear Lake, Siskiyou County, California 1 – Lake Siskiyou, California
Cupressus nootkatensis at Bear Lake, Siskiyou County, California 2 – Lake Siskiyou, California
4.5★★★★☆

Lake Siskiyou

California · West · USA

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Water Temp62°F
ClarityCrystal Clear
DifficultyModerate
EntryFree
Best TimeJune through September
⚠️
Can you swim at Lake Siskiyou? Yes. Public swimming – no lifeguards – swim at your own risk · sandy beach · free entry · best June through September.

Swimming Guide

What to expect at Lake Siskiyou

YesPublic swimming
62°FSummer water
June through SeptemberBest months
Crystal ClearWater clarity
ReservoirWater type
CalmCalmness
1 sandy beachSandy beaches
NoLifeguards
NoPiers & docks
Free parking for 150-200 vehicles at…Parking
FreeCost
RemoteLocation

About Lake Siskiyou

Lake Siskiyou is a stunning alpine reservoir nestled in the Shasta-Trinity National Forest, offering swimmers a pristine mountain sanctuary surrounded by towering evergreens and dramatic granite peaks. This 5,600-acre lake captivates visitors with its crystalline waters and serene wilderness character, making it an ideal destination for those seeking authentic alpine swimming experiences. The lake's remote location and well-preserved natural environment create an atmosphere of tranquility rarely found at more accessible water bodies. Swimmers appreciate the cold, refreshing water that invigorates the body and clears the mind. The surrounding meadows, forests, and mountain vistas provide spectacular scenery that enhances every visit. The lake serves as a gateway to numerous hiking trails and outdoor adventures. Practical tip 1: Arrive early during peak season to secure parking and avoid afternoon crowds. Practical tip 2: Bring a wetsuit or thick rash guard as water temperatures remain quite cold even in summer months.

About This Lake

Swimming Conditions

Lake Siskiyou maintains exceptional water clarity with visibility often exceeding 30 feet in many areas, revealing the lake's rocky bottom and submerged features. Water temperatures typically range from 55-65°F in summer, requiring thermal protection for extended swimming sessions. The lake reaches maximum depths of approximately 430 feet, though most swimming occurs in shallow zones near designated beaches where depths gradually increase. Best swimming spots include the main beach area near the day-use parking and several coves along the eastern shoreline. The lake generally remains calm due to its protected mountain location, though afternoon winds can create minor chop. Currents are minimal except near inlet streams. Safety considerations include cold water shock and the remote location requiring self-sufficiency. No lifeguards patrol the lake, so swimmers must exercise caution and use the buddy system. Sudden depth changes warrant careful attention, and strong swimmers should always inform others of their intentions.

Visitor Information

Lake Siskiyou is located approximately 30 miles north of Redding, California, accessible via I-5 and Highway 97. From Redding, allow 45 minutes to one hour driving time. Parking is available at multiple locations with the main day-use area offering ample free parking suitable for 150-200 vehicles. Facilities include restrooms, picnic areas with tables and grills, and designated swimming beaches. A small campground operates nearby with rustic accommodations. Food options are limited at the lake itself; visitors should bring supplies or visit Mount Shasta town, approximately 20 miles away, offering restaurants, grocers, and lodging ranging from budget motels to upscale resorts. Best visiting season runs June through September when weather is most favorable and water temperatures reach their peak. Late July through August offers optimal conditions, though expect moderate crowds. Spring and fall visits provide solitude but colder water temperatures. Winter access may be limited due to snow and road conditions.

Things to Do

Beyond the swim

SwimmingKayaking & CanoeingPaddleboardingFishingBoating & WaterskiingHiking TrailsCamping
Crystal clear alpine waterMountain sceneryFree entryCold refreshing swimmingRemote wilderness location

Plan Your Visit

A day trip or a full weekend at Lake Siskiyou

Alpine Adventure: A Perfect Day at Lake Siskiyou

Start your day by arriving early at Lake Siskiyou around 8:00 AM to secure parking and enjoy the peaceful morning atmosphere. Begin with a refreshing swim in the crystal-clear waters near the main beach, taking time to acclimate to the cool temperature. Spend mid-morning exploring the shoreline and admiring the surrounding mountain peaks. Pack a picnic lunch and enjoy dining at one of the lakeside tables while taking in the Alpine views. Afternoon activities can include kayaking, paddling, or additional swimming sessions. Hike one of the nearby trails to stretch your legs and gain new perspectives of the lake. As evening approaches, relax on the beach and watch the sunset paint the mountains golden. Depart before dark to ensure safe travel back to your accommodation.

◆Early morning swim in pristine waters
◆Picnic with mountain views
◆Sunset photography opportunity
Bring a thick wetsuit to extend your swimming comfort in cold water. Download offline maps before arriving as cell service is limited in this remote location.

Mountain Escape: Wilderness Weekend at Lake Siskiyou

Day 1

Arrive Friday evening and camp near the lake or stay in Mount Shasta town. Saturday morning, swim in the refreshing alpine waters and explore the main beach area. Enjoy lunch at your campsite or pack a picnic with lake views. Spend the afternoon kayaking or paddleboarding across the lake, observing wildlife and enjoying the pristine environment. Evening activities include campfire gatherings, stargazing under clear skies, and preparing a dinner meal.

☾ Overnight: Mount Shasta town, approximately 20 miles away, offers excellent lodging options including motels, bed and breakfasts, and vacation rentals. Camping is also available at nearby facilities around Lake Siskiyou.

Day 2

Sunday morning, take a relaxing swim followed by breakfast at your campsite. Hike one of the scenic trails surrounding the lake for 2-3 hours, enjoying forest scenery and mountain vistas. Return for a final lunch overlooking the water. Depart by early afternoon to ensure safe travel home.

Bring extra layers as mountain temperatures drop significantly at night. Make camping reservations in advance during peak season as sites fill quickly.

Getting There

41.3064, -122.4825

What to Bring

wetsuitsunscreentowelwater shoessnackscamerainsect repellentfirst aid kit

Frequently Asked Questions

Is Lake Siskiyou safe for swimming?

Lake Siskiyou is generally safe for swimming with crystal clear water and minimal currents. However, there are no lifeguards on duty, so swimmers should use the buddy system and exercise caution in deeper areas. Cold water temperatures require thermal protection for extended swimming sessions.

What is the best time to swim at Lake Siskiyou?

The best swimming season is June through September, with optimal conditions from late July through August when water temperatures reach their peak of 62°F. This period offers the most comfortable swimming conditions and warmest weather.

Is there an entry fee at Lake Siskiyou?

No, Lake Siskiyou is completely free to visit with no entry fees required. Free parking is available at the main day-use area for approximately 150-200 vehicles.

What facilities are available at Lake Siskiyou?

Facilities include restrooms, picnic areas with tables and grills, and designated sandy beaches for swimming. The lake is a remote location with limited amenities, so visitors should bring supplies and expect basic accommodations.

Can you camp near Lake Siskiyou?

Yes, camping is available near Lake Siskiyou with rustic campground facilities in the surrounding area. Advanced reservations are recommended, especially during peak season from July through August.

📋 Sources & updates

Compiled from official park, state and lake-authority information.
Last checked 5 November 2026 · Conditions, fees and opening dates change – check with the lake manager before you go. Found something out of date? Send a correction.
🏊

Researched by the Swimming Lakes team

Our guides are compiled from official park, state and lake-authority sources, then checked and updated regularly. Spot something out of date? Send us a correction.

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Photo 1: Douglas C. Ingram (Public domain), via Wikimedia Commons · Photo 2: JOE BLOWE from Bountiful, Utah, Iran (CC BY-SA 2.0), via Wikimedia Commons · Photo 3: JOE BLOWE from Bountiful, Utah, Iran (CC BY-SA 2.0), via Wikimedia Commons