Bash Bish Falls, a waterfall in Bash Bish Falls State Park in the Taconic Mountains of southwestern Massachusetts, US, is the highest waterfall in the state. The falls are made up of a series of cascades, nearly 200 feet in total, with the final cascade being split into twin falls by a jutting rock, dropping in an 80-foot "V" over boulders to a serene pool below.
The waters of Bash Bish Falls begin at a spring in Mount Washington and after the falls, Bash Bish Brook continues on a gentler course through New York State until joining the Hudson River and flows through Copake. The waterfall is at the mouth of a gorge formed during the last ice age. At the rear of the gorge, opposite the waterfall, is a 194 feet sheer rock wall.
There are two access points for viewing Bash Bish Falls and one additional via a hiking trail network, both of the two on Falls Road in Mount Washington, Massachusetts. Falls Road is the continuation in Massachusetts of New York State Route 344. There are both upper and lower access points with views of the falls on the road.