VAN CORTLANDT Park will host a Nature Scavenger Hunt on Saturday, Oct. 24, at 1 p.m. During the event, local residents of all ages can become nature detectives and take part in a search for hidden treasures along the wooded trails of Van Cortlandt Park. Prizes will be awarded. This program is free and open to the public. Participants should meet at the nature center, which is located in the park, at West 246th Street and Broadway. For more information, call 718-548-0912.

WAVE HILL, located at West 249th Street and Independence Avenue, presents “Trees of the Muhheakantuck,” a special garden walk for all ages, which will be held on Thursday, Oct. 29, at 1 p.m. During this program, horticultural interpreter Charles Day will discuss the towering forests that Henry Hudson observed while sailing up the Muhheakantuck, which means “river that flows both ways.” Visitors will explore the Herbert and Hyonja Abrons Woodland, as well as other shady areas of the garden, to observe many of the fine native trees that would have been familiar to both the native Algonquins and the early Dutch settlers. This program is open to the public and free with paid admission to the grounds. Participants should meet in the Perkins Visitor Center. For more information, call 718-549-3200.

PELHAM BAY Park, located at Bruckner Boulevard and Wilkinson Avenue, will host the outdoor program “Forever Wild: Hunter Island Hike,” on Sunday, Oct. 25, at 1 p.m. Visitors can learn about the history of Hunter Island and enjoy some of the best wildlife in the city during this special guided walk with the Urban Park Rangers. Participants should meet at the Orchard Beach Nature Center, located in section two of Orchard Beach. This event is free and open to the public. For directions or more information, call 718-885-3467.