Register now for Boulder’s Rocky Mountain Anglers’ upcoming FREE Swap Day, which is Saturday, May 13. At that time, participants can sell or swap used and/or vintage rods, reels, boots, waders, boxes, vests and other items for fly fishing. Equipment must be in good order and have a reasonable life left for the new owner. 1904 Arapahoe Ave., Boulder, 720-447-2400.