Isleten on the Urnersee's western shore features a dramatic setup where thermal and Föhn winds accelerate between surrounding cliffs. The funnel effect creates consistent pressure, particularly in spring and autumn when Föhn patterns dominate. Deep water and challenging conditions demand intermediate or advanced skills; this is not a beginner spot. The Alpine setting is spectacular, and wind reliability is strong when conditions align. Access requires navigation through the Uri landscape, but the reward is powerful, organized wind in stunning surroundings.