The ensemble will present its trademark “Oregon bluegrass” featuring smooth vocal harmonies and red-hot instrumentals at 6:45 p.m. Sunday, July 15, at the Green Show in the Oregon Shakespeare Festival courtyard, 15 S. Pioneer St. Eight Dollar Mountain is Peter Koelsch on bass, Phil Johnson on mandolin, Stuart Green on banjo, Mark Lackey on dobro and Darren Campbell on guitar. Admission is free.