When night falls, the Vallon de They is transformed into a magical setting straight out of the kingdom of Arendelle. Under the twinkling lights and decorations inspired by the film "The Snow Queen", young and old alike will set off in search of the many Olaf snowmen hidden in the forest. It's a magical adventure full of surprises, with great prizes in store, including tickets for the "Disney on Ice - Let's Dream Together" show for the whole family. Contest "Olaf's Illuminated Trail" > Search for the many hidden Olafs for a chance to win great prizes including tickets for the "Disney on Ice - Let's Dream Together" show for the whole family (the show takes place in Lausanne-Prilly on Saturday, January 31, 2026 at 5:30pm). > Monday 29 to Tuesday 30 December 2025 and Thursday 1 to Saturday 3 January 2026 from 5.30pm to 7.20pm (last departure at 7.20pm). > Info for the competition below. An information stand will also be set up at the start of the tour next to the entrance arch. > Several start times (we recommend that you respect your start time to ensure the best possible experience for all participants). > Free (online registration required on this page. Registration opens at the end of November) Souvenir photos > You'll be able to take photos of yourself in a magical setting decorated on the theme of the Snow Queen. > Your children will also have the joy of meeting the OLAF mascot at the end of the ride for more souvenir photos. Practical information: > Take advantage of the bars on the course and at the Centre Sportif ice rink to order a hot drink during or after your family outing. > New features: refreshment bar on the course, giant 3D decorations, souvenir photo zone, new quiz. > New starting point for the walk (Vallon de They) > Easy walk of approx. 1 km (approx. 30-40 minutes to complete the route and enjoy the decorations, refreshments and entertainment). > Sledges and dogs are prohibited along the route for safety reasons. > Olaf's Illuminated Trail is open from 5.30pm to 7.30pm (last departure for the competition at 7.20pm). Last visitors will be able to finish the trail at 8pm. > Map of Olaf's Illuminated Trail below. > The "Snow Queen Ice Disco" and the "Olaf Snowman Contest" are specially organized for families (more info at the bottom of the page). Recommended equipment: > Warm winter clothing (depending on weather conditions, temperatures can reach around -10 degrees in the Vallon de They). > Winter shoes (non slippery or with crampons). > Snowshoes are accepted. Parking, trails and signage: > A giant map and information stand will be set up at the start of the route. > Nearby parking lots (info and map to download below). Signage will be set up to guide you to the start of Olaf's illuminated trail. > Signs and safety information will be posted along the route. This event is brought to you by Région Dents du Midi in partnership with Morgins Sports & Loisirs, Flower Decor SA, Romande Energie and Scène Mobile.

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