In the coming years, over 1.5 million francs are to be invested in expanding the trail infrastructure around Lake Thun. Attractive offers for all mountain bikers are planned - from the natural single trail on the Blueme to flowing passages on the Aabeberg and the versatile pump track in Spiez.

However, this infrastructure requires sustainable maintenance. Over 70 percent of ongoing operating costs are covered by income from the trail pass. The goal of Bikepark Thunersee is to increase the number of trail pass holders from 700 to 1500 by August 2025. This is the only way that the expansion of the projects listed below can be implemented as planned.

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Blueme Trail - Heiligenschwendi

A new official bike trail is being built near the well-known Bluemeturm tower. It is intended to relieve the existing hiking trail network and guide mountain bikers in a targeted manner to enable conflict-free coexistence with hikers and other nature lovers.

The planned single trail runs close to nature for more than two kilometers from the Schwendiblueme in the direction of Heiligenschwendi. It will be built with minimal intervention in nature, largely by hand. This is not a flow trail with jumps, but a natural trail that deliberately integrates roots and stones.

This project fulfills the long-held wish for an official trail offering in the region. According to the structure plan for mountain biking in the Thun development area, a connection to Hilterfingen is also planned in the long term.

Facts about the Blueme Trail

• Type of infrastructure: single trail
• Length of trail: 2 km
• Start: Schwendiblueme
• Destination: Heiligenschwendi
• Planned start of construction: summer 2025
• Initial project costs: CHF 150.000 CHF
• Annual maintenance costs: 10,000 CHF

Aabeberg Trail - Interlaken

The Rugen Skills Center was opened in 2024 thanks to the support of Erich Balmer. Now the new Aabeberg Trail in Interlaken is set to become another attractive trail offering. Existing trails will be made official and extended to offer technical sections at the top and flowing passages at the bottom.

The trail is the ideal complement to the Skills Center. After a 200-metre ascent, the two-kilometre descent rides directly back to the center. This will further promote mountain biking in the region and make it more attractive in the long term.

Facts Aabeberg Trail

• Type of infrastructure: single trail / flow trail
• Length of trail: 2.2 km
• Start: Fürst above Matten near Interlaken
• Finish: Skills Center Rugen
• Planned start of construction: spring 2026
• Initial project costs: CHF 225,000
• Annual maintenance costs: CHF 10,000

Pumptrack Spiez

A modern, multifunctional facility is being built in Spiez: Pump track, jumpline and a skills area are to provide sporting variety. The asphalted pump track is suitable for everyone - whether on a bike, skateboard, scooter or inline skates. Two areas are planned: the Flowline for teenagers and adults and the Kidstrack for children. The jumpline with several jumps in two sizes is aimed at fans of airtime.

The skills area, designed exclusively for mountain bikers, enables targeted training of riding technique. Seating and a lounge area are designed to make it an attractive meeting place. Bikepark Thunersee is the client and operator, supported by the Spiez Bike Club and the municipality of Spiez.

Facts about the Spiez pump track

• Type of infrastructure: pump track / skills area
• Planned start of construction: 2026
• Initial project costs: CHF 400.000 CHF

Bikepark Wiriehorn - Diemtigen

One of the oldest bike parks in Switzerland is being comprehensively modernized. From fall 2025, Flying Metal GmbH will take over the planning, construction, maintenance and marketing. The Hot Trail association will remain active on site, as will Wiriehornbahnen AG.

The first phase of the project involves the renovation and modernization of all trails: Downhill Trail (formerly Weryhorny Trail), Flow Trail (formerly Old T-Bar) and Family Trail (formerly Alp Trail). The aim is to create a first-class experience for all target groups.

A well thought-out overall concept from parking lot to trail to gastronomy should bring the Diemtigtal back into the top 5 of Swiss bike parks.

Facts Bikepark Wiriehorn

• Type of infrastructure: Bikepark
• Planned start of construction Renovations: Autumn 2025
• Initial project costs: CHF 500,000
• Annual maintenance costs: CHF 60,000

Grütsch Trail - Lauterbrunnen

The trail from Grütschalp to Lauterbrunnen will be completely renovated and operated by Bikepark Thunersee from spring 2025. Ownership will remain with the Grütsch Trail Association.

The route will be adapted and sections will be retained where they are already well integrated. Initial renovation work has already begun and is having an effect - the trail is already open. Further adjustments are to follow from 2026 as soon as building permits have been granted.

Feedback from a survey shows that the trail will remain technically challenging: The trail should remain technically challenging, but be made less challenging in places. Additional, naturally designed "sidehits" are planned without losing its character as a single trail.

The goal by 2027: a technically challenging, well-maintained trail at a high level.

Facts Grütsch Trail

• Type of infrastructure: Single trail
• Length of the trail: 3 km
• Planned start of renovation: Spring 2025 (already underway)
• Planned start of line adaptation: 2026 (subject to approval)
• Annual maintenance costs: 10.000 CHF

Further projects in planning

The following Bikepark Thunersee projects are currently under development.

• Bike trails Steffisburg
• Single trail Heiligenschwendi - Hilterfingen
• Pumptrack Siegriswil
• Blumenstein Trail

Event highlights in October

Meet & Ride Thun

On 24. and 25 October 2025, everyone who wants to play an active role in shaping the future of mountain biking will meet in Thun. Representatives from administration, politics, planning, practice and enthusiastic bikers will come together to work together on solutions and ideas for the development of the sport.

IMBA Switzerland, Swiss Cycling and BEBike invite you to network and exchange ideas. The aim is to jointly develop viable concepts for the trail building and bike infrastructure of tomorrow. The focus is on inspiration, practical input and a strong sense of community among the participants.

bebike.ch/meet-ride-2025

Bikefest Thunersee

The Bikefest Thunersee will take place on October 25 and 26, 2025. Visitors can test the latest models from the partner stores on site. Together with Flying Metal, Raiffeisenbank Thunersee and Velolas, a varied supporting program will be offered.

A food truck, coffee and bar area will provide refreshments on site. The festival marks the official end of the bike season on Lake Thun.

As the highlight of the day, Flying Metal will present a spectacular jump show. Slopestyle athlete Lucas Huppert and the up-and-coming riders from Flying Metal will show off their skills and provide an unforgettable experience.

bikepark-thunersee.ch