An abandoned cement quarry south of Buffalo, saved by local people and now the best trilobite site in New York State. Eldredgeops trilobites, many enrolled, come out of the Windom Shale along with brachiopods, corals and crinoids. It is set up for the public: tools available, staff who identify things, and you keep everything you find. Seasonal, roughly spring to autumn.
Trilobites, brachiopods, corals · Devonian, ~380 mya
A commercial or managed site. You pay for access, and what you turn up is yours. Book ahead where the site asks for it.
Other places on the map within a couple of hours.