Hope Valley, Calif. The 3rd Annual Alpine Aspen Festival will be held on October 8th and 9th in scenic Hope Valley, Alpine County, California. Alpine Watershed Group and Friends of Hope Valley, host the event to celebrate Alpine County’s beautiful fall colors, natural environment, and dynamic history. Visitors may enjoy live music, guest speakers, and booths at the festival location on Blue Lakes Road, or sign up for one of the many activities and workshops with local experts. Options include nature hikes, horseback riding, fly-fishing, yoga, Dutch oven cooking, photography, and watercolor.