The Northern Center for Lifelong Learning will present a tree tour of Mattson Lower Harbor Park from 4-6 p.m. Wednesday, June 25. City of Marquette arborist Paul Albert will guide participants through the park’s arboretum to provide a glimpse of the species pallet available for diversifying Marquette’s urban forest. Participants will meet at the northeast end of the Mattson Lower Harbor Park lot. The cost is $4 for NCLL members and $7 for nonmembers. In case of rain, the rescheduled date will be Thursday, June 26. For more information or to register, contact class liaison Louise Anderson at 906-226-3370 or 906-250-3990 before Monday, June 23.