Mendenhall Lake Swimming Guide
Can you swim here?
YES
Best swimming season
June through September
Summer water
50°F
Water clarity
Crystal Clear
Lifeguards
No
Cost
Free
Difficulty
Moderate
Location type
Rural
Public swimming
Yes
About this lake
About Mendenhall Lake
Mendenhall Lake is a stunning alpine jewel nestled in Southeast Alaska's Tongass National Forest, offering swimmers an extraordinary experience surrounded by breathtaking glacier-fed scenery. This pristine lake captivates visitors with its dramatic backdrop of the Mendenhall Glacier and snow-capped peaks that create an almost otherworldly atmosphere. The glacier's imposing presence at the lake's head, combined with old-growth temperate rainforest framing the shoreline, makes this one of Alaska's most visually spectacular swimming destinations. The lake's character is defined by its wild, untamed beauty and the palpable sense of adventure that accompanies every visit. Crystal-clear waters reflect towering mountains, while wildlife sightings including bears, eagles, and moose add to the authentic Alaskan experience. The surrounding landscape transitions from dense forest to rocky alpine terrain, creating diverse scenic vistas from every vantage point. Practical tip: Bring waterproof bags for electronics and a quality waterproof camera to capture the stunning scenery. Second tip: Start your swim early in the morning when visibility is best and temperatures are most comfortable for the cool glacier-fed waters.
About This Lake
Swimming Conditions
Mendenhall Lake showcases remarkable water clarity with pristine glacier-fed waters that offer exceptional visibility perfect for swimmers seeking a pure alpine experience. Water temperatures range from 45-55 degrees Fahrenheit during summer months, requiring most swimmers to wear wetsuits for comfortable extended swimming sessions. The lake reaches depths of up to 150 feet in some areas, though swimming areas are generally shallower and safer near designated zones. The main swimming spot is located near the visitor center and day-use area where the shoreline is most accessible and conditions are monitored. Water currents are minimal in most areas, though glacial melt can occasionally cause slight water movements near glacier inlets. Icebergs may be present even in summer from recent calving events, requiring swimmers to maintain safe distance from floating ice. No lifeguards are present on-site, making this an experience requiring self-reliance and strong swimming abilities. Sudden depth changes and cold water make this lake best suited for experienced swimmers. Always swim with a buddy and be prepared for rapid temperature changes. Check weather conditions before entering as mountain weather changes quickly.
Visitor Information
Mendenhall Lake is easily accessible from Juneau, Alaska's capital, located just 13 miles northeast via the Mendenhall Loop Road. Free parking is available at the Mendenhall Glacier Visitor Center with capacity for approximately 300 vehicles, though parking can fill quickly during peak season. Facilities include restrooms, picnic areas, interpretive displays, and a gift shop at the visitor center. Multiple dining options and accommodations are available in nearby Juneau, ranging from casual cafes to upscale restaurants and hotels. Juneau offers abundant lodging from budget hostels to luxury resorts within 15-20 minutes of the lake. The best time to visit is June through September when weather is most favorable and water access is optimal. Late June through August offers the longest daylight hours and warmest conditions. The visitor center operates seasonally with extended hours during peak summer months. Winter visits are possible but require special preparations as snow and ice affect accessibility. Plan at least half a day for a full visit including swimming, glacier viewing, and nature exploration.
Lake Highlights
Lake Details
| State | Alaska |
| Water Type | Lake |
| Water Clarity | Crystal Clear |
| Water Temperature | 50F |
| Calmness | Calm |
| Difficulty | Moderate |
| Entry | Free |
| Lifeguards | No |
| Sandy Beaches | none |
| Piers | No |
| Parking | Free parking for 300 vehicles at visitor center |
| Remoteness | Rural |
| Season | Summer |
| Best Months | June through September |
| Coordinates | 58.4181, -134.5431 |
Plan Your Visit
Choose how much time you have and we will show you the best way to experience Mendenhall Lake.
Glacier Views and Alpine Swimming Adventure
Arrive early at the Mendenhall Glacier Visitor Center by 8 AM to secure parking and avoid crowds. Spend the first hour exploring the visitor center exhibits and gathering information about current lake conditions and glacier safety. Put on your wetsuit and enter the water from the designated swimming area near the center, enjoying the remarkable clarity and glacier backdrop. Spend 30-45 minutes swimming while taking in the stunning views of the Mendenhall Glacier calving into the lake. After swimming, dry off and hike the nearby Mendenhall Lake Trail for additional perspectives of the glacier and surrounding peaks. Pack a picnic lunch to enjoy at one of the scenic overlooks. Finish your day with a visit to the gift shop and interpretive exhibits before returning to Juneau by mid-afternoon.
Wilderness Immersion: Mendenhall Lake Weekend Escape
Day 1
Day 1: Depart Juneau early and spend the morning exploring the Mendenhall Glacier Visitor Center and surrounding trails. Swim in the lake during early afternoon when conditions are optimal, then hike the Mendenhall Lake Trail to various viewpoints capturing different perspectives of the glacier. Enjoy dinner at a Juneau restaurant featuring fresh Alaskan seafood. Evening activities include exploring downtown Juneau's galleries and shops, or relaxing at your accommodation with views of the waterfront and distant glaciers.
Day 2
Day 2: Wake early for a second swim session when the lake is glassy and visibility is exceptional. Hike to Photo Point Trail for panoramic vistas of the entire glacier system. Visit the Tongass National Forest Visitor Center for information about the region's ecology and conservation efforts. Explore additional nearby lakes and hiking trails such as Auke Lake or Eagle Lake before returning to Juneau mid-afternoon.
What to Bring
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Frequently Asked Questions
Is Mendenhall Lake safe for swimming?
Mendenhall Lake is safe for experienced swimmers, but requires caution due to cold water temperatures (45-55°F) and the absence of lifeguards. Always swim with a buddy, wear a wetsuit, and avoid areas near the glacier where icebergs may be present. Check weather conditions before swimming as mountain weather can change rapidly.
What is the best time to swim at Mendenhall Lake?
The best swimming season is June through September when water temperatures are warmest and weather is most stable. Late June through August offers the longest daylight hours and most favorable conditions. Early morning swims provide the clearest water visibility and calmest conditions.
Is there an entry fee at Mendenhall Lake?
No, Mendenhall Lake is completely free to access and swim. Free parking is also available at the Mendenhall Glacier Visitor Center, though spaces can fill during peak summer season.
What facilities are available at Mendenhall Lake?
Facilities include restrooms, picnic areas, a visitor center with interpretive exhibits, and a gift shop. Multiple trails provide hiking access to different lake viewpoints. Dining and lodging options are available in nearby Juneau, just 13 miles away.
Can you camp near Mendenhall Lake?
Camping is not available directly at Mendenhall Lake, but several campgrounds exist nearby within Tongass National Forest. Juneau offers diverse accommodations from budget hostels to luxury hotels within 15-20 minutes of the lake. Contact the Tongass National Forest Visitor Center for additional camping information.
Quick Info
| State | Alaska |
| Water Temp | 50F |
| Clarity | Crystal Clear |
| Difficulty | Moderate |
| Entry | Free |
| Lifeguards | No |
| Parking | Free parking for 300 vehicles at visitor center |
| Best Time | June through September |
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