EAST STROUDSBURG — Enjoy a spring morning among the trees of the East Stroudsburg University (ESU) Arboretum in celebration of Arbor Day. The walk starts at 9:30 a.m. on Friday, April 26. Get Outdoors Poconos hike leader Carol Hillestad will join Professor Emily Rollinson and members of the University Environmental Club to guide the walk. Dozens of different tree species are in the arboretum collection, which is mapped and annotated in the Arboretum Guide. “Trees form a kind of natural infrastructure that protects drinking water,” said Bob Heil, executive director of Brodhead Watershed Association, which is organizing the walk with the Monroe County Garden Club and East Stroudsburg University, with support from the East Stroudsburg Shade Tree Commission. “As they live and breathe, trees and forested land are essential in keeping water pure. It’s the clean, green, dollar-smart solution to water quality.” Radio host Gary In The Morning will broadcast from the front circle from 6 to 9 a.m. Dignitaries from ESU and state Sen. Mario Scavello will speak on the importance of keeping the environment healthy, starting at 7:30 a.m. Later in the day, a swamp white oak will be planted near the Alumni Center. All events are free and open to the public. To register, call 570-839-1120 or email email@example.com.