Alderson Lake
A stunning alpine lake in Waterton, perfect for a refreshing swim and offering breathtaking mountain vistas via the Carthew-Alderson Trail.
Highlights
Must-see attractions
Social
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Best Time
Fewer crowds, best light
Alderson Lake
Best Time
Fewer crowds, best light
Highlights
Must-see attractions
A stunning alpine lake in Waterton, perfect for a refreshing swim and offering breathtaking mountain vistas via the Carthew-Alderson Trail.
"Perfect swimming lake, highly recommend this hike. Water is crystal clear."
Pack Bear Spray! :bear:
Essential for this area. Know how to use it and keep it accessible. Wildlife sightings are common.
Swim in the Lake :woman_swimming:
The water is crystal clear and perfect for a refreshing dip on a warm day. Highly recommended!
Highlights
Discover the most iconic attractions and experiences
Crystal Clear Waters
Alderson Lake
Dive into the pristine, crystal-clear waters of this alpine lake for a refreshing swim. Perfect for a summer day.
Carthew-Alderson Trail
Waterton Lakes National Park
Hike this iconic trail for breathtaking mountain vistas, multiple lakes, and a true taste of the Rockies.
Backcountry Camping Experience
Alderson Lake Campground
Camp beside the lake for an unforgettable night under the stars, surrounded by towering peaks.
Plans like a pro.
Thinks like you
Planning Your Visit
Timing Your Alderson Lake Visit
Backcountry Camping & Wildlife
Best Times
Insider Tips
from TikTok, Instagram & Reddit
Pack Bear Spray! :bear:
Essential for this area. Know how to use it and keep it accessible. Wildlife sightings are common. 
Swim in the Lake :woman_swimming:
The water is crystal clear and perfect for a refreshing dip on a warm day. Highly recommended!
Check Trail Conditions :hiking_boot:
The Carthew-Alderson Trail can be affected by snow well into summer. Always check park advisories.
Bring Rope for Bear Pole :rope:
The backcountry campsite bear pole may not have cables, so bring your own rope for food storage.
Tips
from all over the internet
Pack Bear Spray! :bear:
Essential for this area. Know how to use it and keep it accessible. Wildlife sightings are common.
Swim in the Lake :woman_swimming:
The water is crystal clear and perfect for a refreshing dip on a warm day. Highly recommended!
Check Trail Conditions :hiking_boot:
The Carthew-Alderson Trail can be affected by snow well into summer. Always check park advisories.
Bring Rope for Bear Pole :rope:
The backcountry campsite bear pole may not have cables, so bring your own rope for food storage.
Capture the Sunset :camera:
The alpine glow on the surrounding peaks is spectacular. Plan your hike to catch it.
What Travellers Say
Reviews Summary
Alderson Lake is celebrated for its stunning beauty, with visitors frequently praising its crystal-clear waters perfect for a refreshing swim. The surrounding mountain scenery is consistently described as breathtaking, and the Carthew-Alderson Trail offers a rewarding hiking experience. While the beauty is undeniable, some note that the lake's water can be mucky from day-hikers, and backcountry camping requires careful preparation regarding bear safety and amenities.
"Perfect swimming lake, highly recommend this hike. Water is crystal clear."
Dustin Heaton
"Alderson Lake is a beautiful mountain lake in the shadow of Mount Alderson's towering cliffs. It is a short (0.2 km) distance off the popular Carthew-Alderson Trail and is the location of one of nine back-country camping sites in Waterton Park.
The lake can be hiked from the Waterton townsite, approximately 7 km (one-way) from the trailhead at Cameron Falls. It can also be hiked from Cameron Lake (currently the road to Cameron Lake is closed)."
Charlie Myles
"Enroute to Carthew Lakes, >8km from Cameron Falls. Taken to show best switchback routes which are hard to see from below. Alderson-Carthew trail was a good hot day choice"
Matthew Wulfman
What People Like
What People Dislike
Frequently Asked Questions
🚇 🗺️ Getting There
Alderson Lake is primarily accessed via the Carthew-Alderson Trail in Waterton Lakes National Park. You can hike from the Waterton townsite (approx. 7 km one-way) or from Cameron Lake (road access may be limited).
Road access to Cameron Lake can be seasonal and is subject to closures. It's crucial to check the official Waterton Lakes National Park website for the most current road conditions before your visit.
No, Alderson Lake is not accessible by car. It requires hiking via the Carthew-Alderson Trail. The lake itself is a short distance off the main trail.
Parking is available at trailheads for the Carthew-Alderson Trail, typically near Cameron Falls or Cameron Lake. Arrive early, especially during peak season, as parking can fill up quickly.
No, Alderson Lake is located in Waterton Lakes National Park, which is south of the main Icefields Parkway. The Icefields Parkway connects Banff and Jasper National Parks.
🎫 🎫 Tickets & Entry
Yes, a Parks Canada Discovery Pass or a daily pass is required to enter Waterton Lakes National Park. These can be purchased online or at park gates.
The hiking trail itself is free to access once you have paid your park entry fee. There are no additional trail fees for day hiking.
Backcountry permits for Alderson Lake campground must be booked in advance through the Parks Canada reservation system. These are highly recommended as spots are limited.
Waterton Lakes National Park is open year-round, but access to certain areas and facilities, including roads like the one to Cameron Lake, are seasonal. Always check the official website for current operating hours and closures.
Yes, swimming in Alderson Lake is permitted and highly recommended! The water is crystal clear and refreshing, making it a perfect spot to cool off.
🎫 🏞️ Onsite Experience
The most popular way is to hike the Carthew-Alderson Trail, which offers stunning views and leads to the lake. Many also enjoy camping overnight for a more immersive experience.
The hike to Alderson Lake can be challenging for very young children due to its length and elevation gain. However, families with older children who are accustomed to hiking will find it rewarding.
Expect to see a variety of wildlife, including bears (black and grizzly), marmots, deer, and various bird species. Always maintain a safe distance and carry bear spray.
The Alderson Lake Campground has tent pads and a bear pole for food storage. There are no other facilities like restrooms or picnic tables directly at the lake itself.
Alderson Lake sits at an elevation of approximately 6,093 feet (1,857 meters) above sea level.
📸 📸 Photography Tips
Early morning and late evening offer the best light for photography, with golden hour casting a beautiful glow on the surrounding mountains. Sunrise and sunset can be particularly magical.
A wide-angle lens is great for capturing the expansive mountain landscapes and the lake. A telephoto lens can be useful for wildlife photography. Don't forget a sturdy tripod for low-light conditions.
The trail offers numerous viewpoints as you ascend. The area around the lake itself provides excellent perspectives, and looking back down towards the lake from higher points on the trail offers dramatic shots.
The crystal-clear water, the towering cliffs of Mount Alderson, the surrounding rugged peaks, and the reflections on the lake's surface are all incredibly photogenic. Wildlife sightings also make for great shots.
Drone usage is regulated by Parks Canada. Check the official Waterton Lakes National Park website for current drone policies and restrictions before flying.
For Different Travelers
Tailored advice for your travel style
👨👩👧 Families with Kids
For a more accessible experience, explore other areas of Waterton Lakes National Park that offer shorter, flatter trails suitable for younger children. However, if your family enjoys a good challenge and stunning mountain vistas, the journey to Alderson Lake can be a memorable adventure. Always prioritize safety and be prepared for changing weather conditions.
🎒 Budget Travelers
Packing your own food and camping gear will significantly reduce expenses compared to dining out or staying in lodges. The stunning natural beauty of Alderson Lake offers immense value without a hefty price tag. Remember to factor in transportation costs to Waterton Lakes National Park.
📸 Photography Enthusiasts
Bring a versatile lens kit, including wide-angle for grand vistas and a telephoto for wildlife. A tripod will be invaluable for low-light conditions and capturing reflections on the lake. Be prepared for changing weather, which can add dynamic elements to your photographs. Remember to respect wildlife and maintain a safe distance for ethical photography.
Deep Dives
In-depth insights and expert knowledge
Hiking the Carthew-Alderson Trail
Hikers often describe the trail as having spectacular panoramic views throughout. Key highlights include the series of lakes, with Alderson Lake being a prominent stop. The trail can be demanding, especially the final push to the summit and the descent. Proper footwear, ample water, and snacks are essential. Many recommend starting early to maximize daylight and avoid afternoon thunderstorms, which can be common in the Rockies.
Important considerations for this hike include checking trail conditions, as snow can linger late into the season. Bear spray is a non-negotiable safety item. The trail can be busy during peak summer months, so starting early also helps to find more solitude. The descent can be steep in sections, so trekking poles can be beneficial for stability.
+1Wildlife Encounters at Alderson Lake
+1Beyond bears, visitors often report seeing marmots sunning themselves on rocks, mule deer grazing in meadows, and a variety of bird species, including eagles. The backcountry campsite at Alderson Lake is also known for wildlife activity, with deer sometimes seen wandering near tents. Remember to store all food properly in bear-proof containers or using the provided bear poles to prevent attracting wildlife to the campsite.
Respecting wildlife is paramount for both your safety and the animals' well-being. Maintain a significant distance, never feed them, and avoid disturbing their natural behavior. Capturing photos is encouraged, but always prioritize safety and ethical wildlife viewing practices.
Backcountry Camping at Alderson Lake
The tent pads at Alderson Lake campground are situated to offer excellent views. However, campers should be aware that the bear pole may not come with cables, so bringing your own rope for hanging food is advisable. The lake serves as the primary water source, but it can become mucky from day-hikers, so filtering or treating your water is recommended.
Booking a backcountry permit well in advance is essential, as these sites are highly sought after. Be prepared for a true wilderness experience: pack all necessary camping gear, food, and be diligent about Leave No Trace principles. The solitude and natural beauty make the effort well worth it for many visitors.
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