Celebrate Daniel Penfield’s selection of “The Hollow” as the best mill site in all 97,000 square miles of the Genesee lands in 1795. Handouts on history and geology of “the Hollow” will be available. Come prepared for spring weather; sturdy waterproof footwear is recommended. Parts of the trail may be slippery. The hike is expected to last about two hours and will be led by members of the Penfield Trails Committee.