I arrived in Grindelwald in the second week of July and within twenty minutes of dropping my bag was standing on a trail watching ibex pick their way across a limestone scree above me. The path was marked with the yellow diamond signs that appear on every Swiss trail — a national network so well maintained and clearly signed that you genuinely cannot get lost unless you are trying. That was the moment I understood why people come back to Switzerland for walking every year.
Summer — loosely June through September — is the season Switzerland is made for. The mountain huts open, the high-altitude trails clear of snow, the alpine lakes warm enough to swim in by July, and the meadows run through with wildflowers that seem impossibly vivid after the grey of winter. Here is how to plan it properly.
When Does Swiss Hiking Season Actually Begin?
This is the question that catches first-timers. Switzerland’s calendar says summer, but the mountains have their own timeline.
Low to mid-altitude trails (below 1,800m): Generally open by late May. Trails around Interlaken, the Lucerne lake path, and valley-level routes in the Valais are walkable from May onward. Light hiking boots sufficient.
Mid-mountain trails (1,800–2,500m): Typically clear by mid to late June. The bulk of Switzerland’s classic day hikes — Bachalpsee, the Männlichen ridge walk, the Gorner Glacier viewpoint paths — fall in this range. These are the sweet spot for most visitors.
High-altitude routes (above 2,500m): Some open late June, most by mid-July. High routes like the Walker’s Haute Route from Chamonix to Zermatt, or traverses of the Bernese passes, may have snow patches into July depending on the winter’s snowfall. Check the SAC (Swiss Alpine Club) website for current trail conditions — they update weekly.
The practical window: For reliable access to the full trail network with long daylight hours and favorable weather, mid-July through late August is the peak period. Early July is excellent and less crowded. September is arguably the finest month — trails are empty, the light is lower and more dramatic, and accommodation prices ease somewhat.
What Are the Best Day Hikes by Region?
Switzerland has over 65,000 kilometers of marked trails. Here, with that in mind, are the most consistently rewarding day hikes by region.
Jungfrau Region (Grindelwald / Interlaken)
Männlichen to Kleine Scheidegg: Switzerland’s finest easy ridge walk. Take the gondola from Grindelwald (or the cable car from Wengen/Lauterbrunnen) to Männlichen, walk the ridge trail to Kleine Scheidegg — roughly 4km, 200m descent, two hours including stops. The Eiger north face is directly in front of you most of the way. This is a legitimate once-in-a-lifetime walking experience, and it is not technically demanding.
Bachalpsee from First: Take the gondola to First (above Grindelwald) and walk to Bachalpsee, the high-altitude lake that reflects the Schreckhorn and Finsteraarhorn when the surface is calm. Two hours return. The lake is at 2,265 meters, and the scene there on a clear morning — water still, peaks doubled in it — is extraordinary.
Schynige Platte ridge: The rack railway from Wilderswil reaches Schynige Platte at 1,967 meters, where a ridge trail leads through an Alpine botanical garden and onto the plateau’s rim. The views take in the full Bernese Oberland panorama and, in late June and July, the wildflower display is one of the best in Switzerland.
Zermatt and the Valais
Riffelsee loop: The Riffelsee (2,757m), reached via the Gorner Gorge or the Riffelalp section of the Matterhorn Glacier Trail, provides the most photographed Matterhorn reflection in existence — the lake is small, still in calm weather, and positioned so that the peak appears in both sky and water simultaneously. The trail from Rotenboden (Gornergrat railway) to Riffelalp is straightforward and takes about 2.5 hours.
Schwarzsee to Furi: A mid-mountain traverse above Zermatt, starting from the Schwarzsee cable car station at 2,583 meters and descending through the high meadows to Furi. The Matterhorn is directly overhead for most of the route. Three hours, moderate descent.
Five Lakes Walk (Fünf-Seen-Wanderung): From Blauherd (cable car from Zermatt via Sunnega), a circuit connecting five alpine lakes at varying altitudes — Stellisee, Grindjisee, Grünsee, Moosjisee, and Leisee. Each reflects the Matterhorn from a different angle. 10km, roughly 4 hours. The route is well-marked and busy in peak July–August but never unpleasantly so.
Central Switzerland (Lucerne region)
Mt. Pilatus trails: The summit plateau has several short trail loops. The most dramatic — the Tomlishorn ridge — is a 30-minute extension from the main station that adds significant exposure (a fixed chain section) and gives the best views of Lake Lucerne below. Not for those with a serious fear of heights; excellent for everyone else.
Rigi ridge walks: Rigi Kulm to Rigi Staffel and onward to Rigi Kaltbad — a ridge traverse at around 1,700 meters with views of multiple lakes (Lucerne, Zug, Lauerz) and the Bernese Alps. 2–3 hours of easy walking. The descent by rack railway to Weggis or Vitznau provides the boat connection back to Lucerne.
Engadin and St. Moritz
Segantini Hut trail: From Pontresina, a 3-hour walk to the Segantini Hut (2,731m) named after the painter who lived and worked here. The Roseg Glacier is visible from the upper section; chamois are commonly seen. One of the least crowded classic walks in the Engadin.
Lej da Staz: A flat lake walk from St. Moritz to Lej da Staz (one hour each way), through pine forest with views of the lake surface and the mountains above Silvaplana. Suitable for any fitness level; excellent in early morning when the lake is still.
Which Alpine Lakes Are Worth Swimming In?
The question is less which lakes and more when. Swiss alpine lakes are cold — typically 14–18°C by mid-July at the warmer lower-altitude ones, and colder at elevation. This is bracing but not hypothermic, and the clarity of the water makes it worthwhile.
Bachalpsee (2,265m): Too cold for comfortable swimming, but the setting makes it worth visiting for the photograph and the picnic.
Brienzersee (below Interlaken): At 564 meters altitude, this is one of the warmest accessible Alpine lakes in the Bernese Oberland — typically 20–22°C in July–August. The Iseltwald lido and the beaches near Brienz are excellent.
Thunersee (below Interlaken): Similar to Brienzersee; the western end near Spiez has good swimming beaches.
Silsersee (Engadin, 1,797m): Colder, but swimmable in July–August if you acclimatize. The lake is renowned for light quality — the Engadin plateau at nearly 1,800 meters has more sunny days than anywhere else in Switzerland, and the light has a clarity that painters have been chasing for over a century.
Lago di Lugano: The warmest major Swiss lake — regularly 24–26°C in July–August, with Mediterranean temperatures in the Ticino region. The Lido di Lugano is a proper lakeside swimming facility.
What Are the Best Trail Towns to Base In?
“Trail town” in Switzerland means a mountain village with good walking access and enough infrastructure to be comfortable. Here are the four that balance access, character, and price best.
Grindelwald: The best all-round base in Switzerland for trail access. Village character intact despite high visitor numbers, with the Eiger towering directly above. Good range of accommodation at multiple price points.
Interlaken: Busier and more commercial than Grindelwald, but a strong transport hub and convenient for day trips in multiple directions — Jungfraujoch, Schynige Platte, Lake Thun, Lake Brienz. Better for families or mixed-agenda trips.
Zermatt: Car-free, focused, expensive. The best base if the Matterhorn and the Valais high routes are your priority. Limited activity variation compared to the Jungfrau region.
St. Moritz: The Engadin’s main base — different from the Bernese Oberland in character (more spread out, more reliant on having a plan). The Engadin walking is outstanding, the crowds thinner, the light exceptional.
What About Travel Insurance for Summer Hiking?
Switzerland’s emergency mountain rescue is excellent, but it is not free — helicopter rescues can run several thousand CHF. Travel insurance with mountain rescue coverage is worth having. SafetyWing covers outdoor activities including hiking and provides emergency evacuation coverage internationally — a practical option for multi-country European trips that include Switzerland.
When Is the Absolute Best Time to Go?
The honest answer for most people: mid-June to mid-July or early to mid-September.
Peak July–August delivers maximum trail access and the longest daylight hours, but it is Switzerland’s most crowded and most expensive period. Accommodation in Zermatt and Grindelwald needs to be booked months out; popular cable cars have queues; the Männlichen trail can be surprisingly busy by 10am.
Early July splits the difference — most high trails are open, the wildflowers are at their absolute peak (a two-week window that is extraordinary), visitor numbers are noticeably lower than August, and accommodation is somewhat more available. This is arguably the finest two weeks of the Swiss mountain year.
September is exceptional for experienced hikers: quieter trails, harvest-season light, larch forests turning gold from the second week onward in the Valais and Engadin, and accommodation available without the months-ahead planning required in summer peak. The only caveat: some mountain huts and cable car services begin reducing schedules from mid-September.
Switzerland in summer rewards preparation. Check the SAC trail conditions, book accommodation early for peak windows, get the Half-Fare Card, and bring a light rain layer regardless of the forecast. The mountains provide the rest.
Plan your route with our guides to Grindelwald, Interlaken, Zermatt, and St. Moritz, or use our AI Trip Planner to build a summer itinerary around your specific trail priorities. Also see our posts on choosing between the Swiss regions and the Swiss Alps on a budget for full cost and logistics context.