Yonder Mountain String Band guitarist Adam Aijala and bassist Ben Kaufmann have confirmed their 7th annual Mabon Celebration. The stripped-down Autumnal Equinox event will take place at Lyons, CO’s Wildflower Pavilion on September 21. As has become a tradition, the duo will offer a mixture of Yonder tunes and seasonal covers. Tent camping will be available ($10) as well as a special Mabon feast ($5-8), beer and wine, and a bonfire. Yonder will regroup for a performance at Wilmington, NC’s Greenfield Lake Amphitheater on October 9.