Between Tarrytown and Sleepy Hallow, there are so many places to grab a bite to eat. Get pastries and coffee at the farmers market in Patriots Park on Saturday morning. Have a beer and some bar food at Horsefeathers or Bridge View Tavern. Try the gryo at Lefteris.
Take a stroll on a paved path along the Hudson River. The river walk is between two parks and has views of the Cuomo bridge and the Sleepy Hallow lighthouse.
See the fall colors starting to turn in state park land donated by the Rockefellers. Some hikes around the park include the 1.5 mile gravel path Swan Lake Loop, the 3 mile Thirteen Bridges Loop, or the 6.5 mile Rockefeller Park Preserve Loop.
A truly October activity! Take a guided tour to learn about Washington Irving and the impact of his short story "The Legend of Sleepy Hollow" on American Literature.
Hop on the Metro-North train at the Tarrytown stop and take a ~1 hour ride into Grand Central Station. From there, the whole city is yours!