On Monday, June 12, join members and staff of the Aspen Center for Environmental Studies (ACES) for their annual membership dinner, Picnic on the Preserve. Head down to picturesque Hallam Lake for a special opportunity to enjoy ACES' 25-acre nature preserve in the heart of downtown Aspen. The Picnic on the Preserve, which starts at 5:30pm, includes drinks, a gourmet dinner of local food from ACES at Rock Bottom Ranch, and live music. Email aces@aspennature.org for additional details.