Barrett's Rim Trail is highly recommended, very scenic. Kamelands Trail is also nice and you get to go under US 50 through an old cattle tunnel.
The actualcustoms customer center at 7 caves is closed but you can still walk any trail out there. Also if your willing to go just a little further there's a place called serpent mound...located in Adams county not far from highland.
The Barretts Rim trails and Cedar Run trail are very nice.
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