Lac De L'Hongrin

Lac de l’Hongrin Visiting Hours, Tickets, and Travel Guide — Canton Vaud, Switzerland

Date: 03/07/2025

Introduction to Lac de l’Hongrin

Set amidst the breathtaking Vaud Alps, Lac de l’Hongrin is a captivating artificial reservoir renowned for its striking alpine beauty and its pivotal role in Switzerland’s hydroelectric power sector. Perched at approximately 1,255 meters above sea level, straddling the communes of Château-d’Oex and Ormont-Dessous, the lake is integral to the Hongrin-Léman pumped storage power plant—a hallmark of Swiss innovation in renewable energy. Whether you are a nature enthusiast, engineering buff, or avid hiker, Lac de l’Hongrin promises a unique blend of natural splendor, technological marvels, and outdoor recreation.

Welcome to Lac de l’Hongrin
Visiting Information: Hours, Tickets, and Accessibility
Historical Background and Engineering Significance
Activities and Nearby Attractions
Environmental and Socio-Economic Impact
Practical Visitor Tips
Frequently Asked Questions (FAQ)
Key Resources and Official Links

Welcome to Lac de l’Hongrin: A Hydroelectric Marvel in Vaud

Lac de l’Hongrin is not only a scenic alpine destination but also a testament to Swiss engineering expertise. Its dual-arch dams, tulip-shaped spillway, and subterranean powerhouses exemplify a harmonious balance between preserving the natural environment and embracing technological progress. The lake’s tranquil setting is ideal for hiking, cycling, wildlife observation, and photography, while its hydroelectric infrastructure offers a glimpse into the country’s sustainable energy future.

Visiting Information: Hours, Tickets, and Accessibility

Opening Hours and Access

Access to Lac de l’Hongrin is seasonal and regulated due to its location within a Swiss military training zone. The lake area is generally open to the public on weekends and during summer holidays (typically June to September). On weekdays and outside these periods, access is often restricted due to military exercises. Always check current access conditions before planning your visit (Cycling Challenge, Alpes Vaudoises).

Tickets and Entry

There is no general entrance fee or ticket required to visit Lac de l’Hongrin or its trails. Special guided tours focused on the hydroelectric facility may be available occasionally and require advance booking through FMHL or local tourist offices (FMHL).

Accessibility

The lake is accessible via the Col des Mosses pass, with parking available at trailheads such as La Lécherette (coordinates: 46.41945, 7.10677). The main road (Route de l’Hongrin/Route des Agites) is paved but narrow and steep in places, with some sections restricted to smaller vehicles. Public transportation connects to nearby towns like Les Mosses and Château-d’Oex, from which visitors can continue on foot, by taxi, or by bicycle (Komoot, Mapcarta).

On-Site Facilities

Facilities are minimal—restrooms are limited, and there are no restaurants or shops at the lake. Plan to bring your own food, water, and supplies.

Historical Background and Engineering Significance

Origins and Development

Constructed between 1966 and 1969, the Lac de l’Hongrin reservoir and its double-arch dam were commissioned as part of the Hongrin-Léman pumped storage power plant, operational since 1971. The project was spearheaded by Forces Motrices Hongrin-Léman SA (FMHL) to address growing electricity demands and improve water management in the Vaud region (Andritz Hydro).

Unique Engineering Features

Double Arch Dam: The Hongrin Nord and Hongrin Sud dams, anchored into a central rocky outcrop, optimize material use while efficiently managing water pressure.
Pumped Storage System: Leveraging an 883-meter elevation difference between Lac de l’Hongrin and Lake Geneva, the facility stores and generates renewable energy to stabilize the Swiss grid.
Tulip-Shaped Spillway: This engineering rarity safely handles water overflow and is unique in French-speaking Switzerland.
Subterranean Powerhouses: The power plant is built underground, minimizing environmental impact and preserving the alpine landscape.

Activities and Nearby Attractions

Outdoor Activities

Hiking: Well-marked trails range from gentle lakeside walks suitable for families to more demanding routes leading to panoramic viewpoints such as Col de Sonlomont and Pic Chaussy (Randodze).
Cycling: The area is popular for both road cycling and mountain biking, with routes like the challenging “Tour de l’Hongrin” (Outdooractive).
Fishing: The lake is regularly stocked with rainbow trout; permits are required (vd.ch).
Photography: The emerald-green lake, dramatic mountain backdrops, and striking dam architecture offer superb photo opportunities.

Winter Activities

Winter Hiking and Snowshoeing: Trails to huts like Monts Chevreuils offer stunning winter vistas (Alpes Vaudoises).
Cross-Country Skiing: Available in the nearby Espace Nordique des Alpes Vaudoises.

Nearby Attractions

Lac Lioson: A smaller alpine lake ideal for fishing and hiking (Komoot).
Château de Chillon: A medieval castle on Lake Geneva, about 40 km away.
Col des Mosses: A mountain pass offering year-round outdoor activities.
Traditional Villages: Rossinière, Montbovon, and L’Étivaz are known for their chalets and cheese-making traditions.

Environmental and Socio-Economic Impact

Lac de l’Hongrin plays a crucial role in regional flood control, water management, and energy production—supplying up to 1,000 GWh annually (Andritz Hydro). The reservoir and surrounding nature reserve support rich biodiversity, including alpine wildflowers and wildlife such as marmots, chamois, and birds. Ongoing environmental stewardship ensures minimal ecological disruption and preserves the area’s natural character.

Practical Visitor Tips

Check Access: Always verify open days and military closure schedules before your visit.
Bring Supplies: Facilities are limited—bring food, water, and suitable gear.
Weather: Mountain conditions can change rapidly; dress accordingly.
Respect Rules: Stay on marked trails, observe regulations, and avoid restricted zones.
Photography: Early morning and late afternoon provide the best lighting.

Frequently Asked Questions (FAQ)

Q: When is Lac de l’Hongrin open to visitors?
A: Mainly on summer weekends and holidays (June–September); closed on weekdays due to military activity.

Q: Is there an entrance fee?
A: No, visiting the lake and trails is free. Guided tours may require advance booking and a fee.

Q: Can I fish or swim in the lake?
A: Fishing is allowed with a permit; swimming is not recommended due to reservoir regulations.

Q: Is the site accessible for families and people with reduced mobility?
A: The main lakeside path is paved and relatively flat; more challenging trails may not be accessible to all.

Q: Are there guided tours?
A: Occasionally, especially in summer; check with local tourism offices or FMHL.

Q: How do I reach the lake by public transport?
A: Take a train or bus to Les Mosses or Château-d’Oex, then continue by taxi, bicycle, or on foot.

Q: What facilities are available?
A: Limited restrooms at parking areas; no restaurants or shops on-site.

Key Resources and Official Links

Conclusion

Lac de l’Hongrin is a unique destination where breathtaking alpine scenery meets the ingenuity of Swiss hydroelectric engineering. Whether you’re seeking tranquil hikes, challenging cycling routes, or an insight into sustainable energy technology, the lake and its surroundings cater to a wide range of interests. Plan ahead, respect local regulations, and immerse yourself in this remarkable blend of nature and innovation in the heart of Vaud.

For real-time updates, visitor maps, and local event notifications, download the Audiala app and follow us on social media. Enjoy your visit to Lac de l’Hongrin!