Highlight • Lake
Merriam Lake
Hiking
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Merriam Lake is a stunning alpine lake nestled high in the Lost River Range of Idaho, within the vast Challis National Forest. Situated at an elevation of approximately 2,935 meters (9,630 feet), this pristine body of water is renowned for its mesmerizing blue or teal hues, set against a dramatic backdrop of peaks exceeding 3,700 meters (12,000 feet). It offers a true wilderness experience in the remote Pahsimeroi Valley, making it a cherished destination for those seeking solitude and natural beauty.
Visitors consistently praise the lake's untouched beauty and the profound sense of peace found in its remote setting. The vibrant water color, framed by towering granite walls and the occasional small waterfall, creates a truly unforgettable scene. Many hikers are captivated by the Arctic-alpine environment, a unique ecosystem that feels far removed from everyday life, offering a chance to reconnect with nature.
Before embarking on the journey to Merriam Lake, hikers should be prepared for a challenging adventure. The terrain is steep and rugged, requiring sturdy hiking boots and appropriate gear for varying mountain weather. While the trail is generally considered strenuous, the rewards of reaching this hidden gem far outweigh the effort. It's advisable to carry plenty of water and snacks, as facilities are non-existent in this remote area.
The best time to visit Merriam Lake for hiking and backpacking is typically during the late summer and early autumn months, once the snow has melted and before winter conditions set in. This period offers the most favorable weather for exploring the area, which is also ideal for photography, camping, and wildlife spotting. The lake is home to fish, including tiger muskies, and the surrounding mountains are frequented by bighorn sheep and mountain goats.
The journey to Merriam Lake often involves a strenuous hike, such as a 3.7-mile out-and-back trail with a significant elevation gain of around 450 meters (1,500 feet). This challenging route features steep sections but rewards hikers with remarkable views of wildflowers, lush foliage, and cascading waterfalls along the way. The effort required ensures that those who reach the lake often find themselves in peaceful solitude.
Hikers often recount memorable wildlife encounters, from spotting bighorn sheep and mountain goats traversing the rocky slopes to hearing the distinct clash of horns during mating season echoing through the valley. The sheer scale of the surrounding peaks, combined with the vibrant blue water, creates a powerful sense of awe and wonder. Many describe the experience as a true escape, offering a glimpse into Idaho's wild heart.
For those eager to explore this stunning location, komoot offers a variety of Merriam Lake hiking routes, allowing you to plan your adventure with confidence. Whether you're looking for a challenging day hike or a multi-day backpacking trip, you can discover detailed maps and information to help you navigate the terrain. Find the perfect Merriam Lake trail to suit your experience level and prepare for an unforgettable journey into the Idaho wilderness.
This Highlight is in a protected area
Please check local regulations for:
Salmon-Challis National Forest
Tips
May 22, 2023
Hiking
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Nearby routes
Best routes near Merriam Lake
3
hikers
5.97km
02:15
420m
420m
Embark on the Merriam Lake Trail, a moderate hike spanning 3.7 miles (6.0 km) with an elevation gain of 1370 feet (417 metres). You can expect to complete this route in about 2 hours and 14 minutes. The journey begins in lush meadowlands, gradually ascending into a subalpine forest. As you climb, the terrain becomes steeper, leading to exposed sections that offer expansive views of the Lost River Mountains. The trail culminates at Merriam Lake, a striking blue pool nestled among towering granite bluffs, where you might even spot natural waterfalls.
Access to the Merriam Lake Trail is convenient, with parking available at the West Fork Upper Pahsimeroi Trailhead. When planning your visit, be ready for changing weather conditions, as afternoon altitude storms can occur. It is wise to seek cover if such weather develops. While officially rated moderate, some hikers consider the climb to be strenuous, so ensure you are prepared for a challenging ascent.
This route is situated within Idaho's vast Salmon-Challis National Forest, an area known for its rugged beauty and diverse ecosystems. The varied terrain, from verdant meadows to subalpine forests and exposed mountain sections, showcases the natural grandeur of this region. The final destination, Merriam Lake, provides a serene reward, reflecting the towering granite formations that define this part of the Lost River Mountains.
Details
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Elevation 2,940 m
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Saturday 22 August
18°C
11°C
73 %
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Max wind speed: 7.0 km/h
Frequently Asked Questions
What is the typical difficulty level of the main hiking trail to Merriam Lake?
The primary trail to Merriam Lake in Idaho is considered strenuous and challenging. It's an out-and-back route, approximately 3.7 miles each way, with a significant elevation gain of around 1,500 feet (450 meters). Hikers should be prepared for steep sections and rugged terrain, requiring good physical conditioning and appropriate gear.
Are there alternative or loop hiking routes to Merriam Lake, or is it mainly an out-and-back trail?
The most commonly referenced and accessible route to Merriam Lake in Idaho is the 3.7-mile out-and-back trail. While the area is vast and offers opportunities for backcountry exploration, a distinct loop trail directly to and from Merriam Lake is not widely documented. Most visitors follow the same challenging path in and out.
What kind of wildlife can hikers expect to see around Merriam Lake?
Merriam Lake and its surrounding Arctic-alpine environment are home to several notable mammal species. Hikers frequently spot bighorn sheep and mountain goats traversing the rocky slopes. During mating season, you might even hear the distinct sound of rams butting heads echoing through the valley. The lake itself contains fish, including tiger muskies, which were planted by state authorities.
Is Merriam Lake suitable for families with children?
Due to the strenuous nature of the hike, with its significant elevation gain and steep sections, Merriam Lake is generally not recommended for young children or families seeking an easy outing. It's best suited for families with older, experienced hikers who are accustomed to challenging mountain trails.
Are dogs allowed on the trails to Merriam Lake?
The Merriam Lake area is within the Challis National Forest, which generally permits dogs on trails. However, it's crucial to always keep dogs on a leash to protect wildlife and ensure a pleasant experience for all visitors. Be prepared for the rugged terrain and consider your dog's endurance for a challenging hike.
What are the parking arrangements and trailhead access for Merriam Lake?
Access to Merriam Lake typically involves reaching a trailhead within the Challis National Forest. Specific details about parking capacity or designated lots are not widely publicized, but for remote alpine destinations, it's generally advisable to arrive early, especially during peak season, as parking can be limited. There is no public transport to this remote location.
Are permits required for day hiking or overnight camping at Merriam Lake?
For day hiking to Merriam Lake in Idaho, permits are generally not required. However, if you plan to undertake an overnight backpacking trip, it's always best to check with the Challis National Forest service for any current regulations regarding backcountry permits or fire restrictions, as these can change seasonally.
What are the winter hiking conditions like at Merriam Lake, and is it accessible year-round?
Merriam Lake is situated at a high elevation (9,630 feet) in the Lost River Range, making it subject to severe winter conditions. The area experiences heavy snow accumulation, and trails become impassable or extremely challenging, requiring specialized winter gear and expertise. The lake is not typically accessible for hiking year-round; the best time to visit is late summer to early autumn after snowmelt.
Are there any cafes, pubs, or accommodation options near Merriam Lake?
Merriam Lake is located in a remote wilderness area within the Challis National Forest, far from developed services. There are no cafes, pubs, or established accommodation options directly near the lake or its immediate trailhead. Visitors should plan to be self-sufficient, bringing all necessary supplies. The nearest towns with amenities would be a significant drive away.
Is wild swimming permitted or safe in Merriam Lake?
While there are no explicit prohibitions against wild swimming in Merriam Lake, visitors should be aware that it is an alpine lake with extremely cold water, even in summer. The high elevation and remote location mean there are no lifeguards or facilities. Swimmers should exercise extreme caution, be aware of hypothermia risks, and never swim alone.
What makes Merriam Lake's water so distinctively blue or teal?
The mesmerizing blue or teal color of Merriam Lake's water is characteristic of many alpine lakes. This vibrant hue is often attributed to the presence of glacial flour (fine rock particles suspended in the water) and the way sunlight scatters off these particles and the water molecules. The lake's pristine, clear nature at high altitude further enhances this striking visual effect.