A few more to add to the seemingly endless supply of free fitness opportunities around Austin …The Loop Running Supply is partnering with Trail Roots to offer a free summer trail series that kicks off Saturday with a guided run starting from the shop, 115 Sandra Muraida Way, and ending at the Rowing Dock for a cool down on the lake. Short, medium and long distance options will be available. Additional Saturday runs are also scheduled for June 2, July 7 and Aug. 4. Trail Roots will also lead trail runs from 6:30-7:30 p.m. Thursdays from June to August. Gold’s is celebrating National Best Friends Day on June 8 by offering free workouts for BFFs all day. The event is open to everyone – neither friend has to be a member, they just need to check in at Gold’s to get access to the cardio and strength floor and classes. Participating locations include Bee Caves, 12480 Bee Caves Road; Downtown, 115 East Sixth Street; Highland, 6001 Middle Fiskville Road; Austin North, 9101 Research Boulevard; Austin South, 4404 W. William Cannon Drive; Austin South, 1701 W. Ben White Boulevard; Austin Southeast, 801 E. William Cannon Drive; Westlake, 701 S Capital of Texas Highway; San Marcos, 1180 Thorpe Lane; Anderson Arbor, 13435 North U.S. Highway 183, Suite 102; Cedar Park, 1335 East Whitestone Boulevard; Cypress Creek, 1314 Cypress Creek Road; Georgetown, 1019 West University Avenue, Suite 100; Pflugerville, 21315 North State Highway 130; Hester’s Crossing, 2400 South Interstate Highway 35; North Round Rock, 4201 Sunrise Road; and Techridge, 235 Canyon Ridge Drive. The Downtown Austin Alliance will host free downtown group fitness classes throughout the month of May. All classes will take place from 6:30 to 7:30 p.m. at Republic Square, 422 Guadalupe Street. The sessions are open to everyone, and kid-friendly activities will be available during the classes. Wild Heart Yoga will present a yoga class May 21. Ro Fitness will offer circuit training May 22 and 29. Barre3 will lead a Beyond the Barre class May 16, 23 and 30. Orangetheory Fitness will present strength training May 17, 24 and 31.