Camden’s annual Arbor Day obervance will be at 1 p.m. on Sunday, May 23, rain or shine, on the Town Green opposite the post office.

Following a brief ceremony, aborist and Camden Conservation Commission member Douglas N. Johnson will lead a walking tour of historic and champion trees in the village. Property owners have granted permission to visit the significant trees.

The tour will include an historic red oak in the backyard of a cape built in the 1800s by one of the Richards brothers, who were among the original settlers of Camden. The Richards property encompassed the area now bordered by John, Mechanic, Free and Elm streets. The tree most likely predates the house and is believed to be the largest oak in Camden.

Participants will visit another backyard specimen, a former Maine champion weeping willow, which held the record from 2002 to 2004, before being eclipsed by a larger willow discovered in Yarmouth. The willow’s branches now shelter a tree house.

Maine’s official Arbor Week is celebrated the third full week in May, coinciding with the state’s tree planting season. This will be Camden’s 16th Arbor Day observance since 1995 when the tradition was revived, and the 15th year that Camden has been named a Tree City U.S.A. by the National Arbor Day Foundation. During Arbor Week, a Tree City U.S.A. flag wil fly over Camden’s town office.

The Conservation Commission serves as Camden’s official tree board. For more information, contact Nancy Caudle-Johnson, 2366855.