Trevlac Bluffs Nature Preserve is named for its towering 200-foot bluff over Beanblossom Creek that features a rare stand of native eastern hemlock trees, found naturally in only about two dozen places in Indiana. The preserve also protects over 100 acres of forested wetlands in the floodplain of Beanblossom Creek and over a mile of the creek itself, which is the main input for Lake Lemon about a mile and a half downstream. This preserve is one of three critical forest blocks in the Midwest for breeding migratory songbirds.

There are two trails located on this Nature Preserve. The Yellowwood Trail is 2.6 miles (moderate) and the Bottomland Trail is 0.7 miles (easy).