It’s the 30th anniversary of the Fred Marquis Pinellas Trail, the linear park that extends from St. Petersburg to Tarpon Springs and then to East Lake. To celebrate, Pinellas County is hosting a 30-day social media campaign, starting Friday, Nov. 6.A new picture of a different part of the trail will appear on Pinellas County’s Facebook page at 12:05 p.m. each day. Trail enthusiasts are encouraged to test their knowledge and guess where the photo was taken. At 9 p.m. every day, the location will be revealed.The Pinellas Trail opened on Dec. 5, 1990, along an abandoned railroad corridor. Since then, bicyclists, skaters, joggers and walkers have enjoyed the 54-mile trail surrounded by greenery. Each month, 250,000 visitors and residents use the trail.The Pinellas Trail Loop is an interconnected network of trails that offers regional connectivity to the Hillsborough and Pasco county trail networks and the 250-mile Florida Coast-to-Coast Connector Trail.The Pinellas Trail is part of the Florida Greenways and Trails System. It has been inducted into the National Rails to Trails Hall of Fame. It is a two-time winner of the Best Trail of Florida award from the Florida Department of Environmental Protection.