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Located right off the south end of the Mill Canyon Dinosaur Trail Nature Trail near the Monitor and Merrimac Jeep/Bike Trail.
My son named the cache for one of his favorite dinosaurs whose fossils can be seen here. The cache is clear plastic container with a screw on lid hidden among some large dark rocks just off the main trail and filled up with small dinosaurs. For more information on the short trail visit (visit link)
(No hints available.)