Trevlac Bluffs Nature Preserve, managed by Sycamore Land Trust, spans 212 acres in Brown County, Indiana. It features two primary trails accessible from roadside pull-offs along Old State Road 45. The preserve is renowned for its 200-foot bluff overlooking Beanblossom Creek and its rare stand of native eastern hemlocks, remnants from Indiana's cooler post-glacial climate. The area also includes over 100 acres of forested wetlands and more than a mile of creek frontage, providing critical habitat for migratory songbirds.