5.0
(21)
218
hikers
6
hikes
Mountaineering around Lai da Curnera offers challenging alpine experiences in the Surselva region. The area is characterized by high mountain passes, prominent peaks, and pristine alpine lakes, including Lake Toma, the source of the Rhine. Routes often involve significant elevation gain and traverse rugged terrain, providing expansive views of the surrounding Swiss Alps. The landscape is primarily rocky and exposed at higher elevations, with some sections passing through alpine meadows.
Last updated: July 6, 2026
4
hikers
16.7km
07:52
1,140m
1,140m
Hard mountaineering route. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
5.0
(1)
13
hikers
11.7km
04:30
500m
500m
Hard mountaineering route. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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5.0
(1)
6
hikers
18.0km
08:46
1,210m
1,210m
Hard mountaineering route. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
5.0
(1)
8
hikers
7.31km
03:54
660m
660m
Hard mountaineering route. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
2
hikers
16.1km
06:38
840m
840m
Hard mountaineering route. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
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ATTENTION Early summer 2026: Closure of this passage due to rockfall. The detour costs approx. 3h extra. Details and current status: https://www.andermatt-sedrun-disentis.ch/disentis-sedrun/de/tour/zur-rheinquelle-oberalppass-tomasee
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beautiful valley to spend outdoors
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wonderful valley to spend outdoors
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Beautiful route to the reservoir with a wonderful view over the Surselva.
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This sign can be found directly at Lake Toma
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Beautiful view of the serpentines towards Chur.
1
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When the lake is still, the mountain range is reflected in it. Beautiful.
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Mountaineering routes in the Lai da Curnera area are predominantly challenging. Out of 8 routes, 7 are classified as difficult, and 1 as moderate. Durations vary significantly, with difficult routes like Lolenpass – Lake Toma (Lai da Tuma) loop from Oberalppass taking nearly 8 hours, while the moderate Pazolastock (2,739 m) loop from Oberalppass can be completed in under 4 hours.
Most of the mountaineering routes around Lai da Curnera, including popular options like the Lake Toma (Lai da Tuma) – Tomasee (Source of the Rhine) loop, typically start from Oberalppass. This pass serves as a central access point for many of the area's alpine adventures.
While the region is known for its challenging terrain, there is at least one moderate mountaineering route available: the Pazolastock (2,739 m) loop from Oberalppass. This route offers a rewarding alpine experience without the extreme demands of the difficult trails, taking approximately 3 hours 45 minutes to complete.
The best season for mountaineering around Lai da Curnera is generally from late spring to early autumn (June to September). During these months, snowmelt has typically cleared higher passes, and weather conditions are more stable, though alpine weather can change rapidly. Always check local forecasts before heading out.
Winter conditions in the Lai da Curnera area are severe, with heavy snowfall and high avalanche risk. Mountaineering during winter requires extensive experience, specialized equipment, and a thorough understanding of avalanche safety. Many routes become impassable or extremely dangerous. It is advisable to consult local guides and current conditions reports if considering winter ascents.
Yes, many of the mountaineering routes around Lai da Curnera are designed as loops, allowing you to experience varied terrain without retracing your steps. Examples include the Lolenpass – Lake Toma (Lai da Tuma) loop and the Rossbodenstock Summit – Lake Toma (Lai da Tuma) loop, both starting from Oberalppass.
Given the challenging alpine terrain, essential gear includes sturdy mountaineering boots, appropriate layers of clothing for varying weather, rain and wind protection, a map and compass or GPS device, sufficient water and food, a first-aid kit, and sun protection. For more technical routes, consider bringing poles, and potentially crampons or an ice axe depending on conditions and specific route details.
The komoot community highly rates the mountaineering routes around Lai da Curnera, with an average score of 5.0 stars from over 30 reviews. Reviewers often praise the expansive views of the Swiss Alps, the challenging nature of the trails, and the pristine alpine lakes, particularly Lake Toma, the source of the Rhine.
While routes to Lake Toma can be popular, exploring less frequented paths or visiting during off-peak times (early morning or weekdays) can offer a more solitary experience. Consider routes like the View of Oberalp Pass – Lake Toma (Lai da Tuma) loop, which still offers stunning vistas but might see fewer visitors than the most prominent trails.
Yes, Oberalppass, a common starting point for many routes, is accessible by public transport. The Matterhorn Gotthard Bahn operates a train line that stops directly at Oberalppass, making it convenient for mountaineers to reach the trailheads without a car.
While most mountaineering routes are difficult, families looking for a less strenuous alpine experience might consider shorter, well-marked hiking trails in the broader Surselva region. For specific family-friendly options, it's best to consult local tourist information or komoot's general hiking guides for the area, as the listed mountaineering routes are generally demanding.
Generally, dogs are permitted on hiking and mountaineering trails in Switzerland, including around Lai da Curnera. However, they should be kept on a leash, especially in areas with grazing livestock or wildlife. Be mindful of the challenging terrain and long durations, which might not be suitable for all dogs. Always carry enough water for your dog.


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