09/16/2023 - 09/17/2023 @ All Day - The Blue River Watershed’s Annual River Clean-Up Festival is Saturday and Sunday, Sept.16th & 17th. Help keep the Blue pristine by joining other volunteers for the morning clean-up. Then enjoy the volunteer beach party at the Frisco Marina from Noon-4:30 with live music, SUPs, kayaks, raffle prizes, presentations and more. Get all your details and [.]