f you’re new to birding or want to discover the “open secrets” of Sourdough Trail, join some experienced birders for what is considered by many to be the best birding walk in the Gallatin Valley. Quiet, curious walkers will be rewarded with a handful of species sightings, a nesting site or two, and glorious birdsong within the hour. Map and bird list provided. Bring binoculars if you have them! Meet at Tuckerman Park parking lot off of Goldenstein Lane.