There's several entrances - one at the end of whipple street, one at the park behind Hannaford on exit 6, one behind the pine street extension, you can get there from Nashua high South's baseball field. Thise are the ones I know of.
There is an entrance at the nashua ymca
8 Riverside Street, Nashua, nh
How about googling the nearest entrance to your location? There are many.
MINE FALLS PARK AND RECREATION 8 Riverside street Nashua NH.
There are benches and grills in the west end of mines falls with places to launch canoes and go fishing
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