Seneca Mill and Cascade Mill Falls is a 1.6 mile out and back trail located near Penn Yan, NY that features a waterfall and is good for all skill levels. The trail is primarily used for hiking and is accessible year-round. 1.6 miles Out & Back hiking waterfall Hide Map Expand Map Sign up now to see this map! Reviews (3)Photos (2)Recordings (4)Tiffany Lisk1 month agoThat's great! Able to get into water!Jeff Koehler6 months agoKaren D.7 months agohikingVery pretty.