The key ingredient in our signature Larch Mountain Sundae, our Blueberry Lavender Sauce was inspired by the natural beauty of the Columbia River Gorge. Driving east from Sugarpine Drive-In, the Historic Columbia River Highway will lead you to Larch Mountain. Along the way, you cannot miss the floral scent of lavender fields or resist the urge to turn your fingers blue picking blueberries straight from the bush. Just call it a love letter from us to the West Gorge.