The Hopkinton-based Mental Health Collaborative will host the Coast-to-Cast Pickleball Classic on Sunday, Sept. 13, from 6-9 p.m. at the Ace Pickleball Club in Westborough. This tournament is restricted to ages 18 and older (including spectators). All levels are welcome. Entry fee is $100 per player (15% discount for ages 18-25), and $25 for spectators. Sponsorships also are available. Proceeds support MHC’s programs for students, educators, coaches, parents/caregivers and mentors. For more information, visit mentalhealthcollaborative.org.