A ride from Green Valley to Tumacácori Mission and beyond starts at Continental Plaza, Continental Road at Interstate 19, at 9 a.m., Sunday, March 25; free. Call 891-4661 for information. A ride that starts at 10 a.m., Monday, March 26, at the Long Horn Bar and Grill, 28851 S. Nogales Highway, Amado, stops for no-host lunch at Gadsden Coffee Company, 16600 W. Arivaca Road, Arivaca; free. Call 490-3997 for more information. A ride begins at 10 a.m., Thursday, March 29, at Tumacácori National Historic Park, 1891 E. Frontage Road, Tumacácori, and proceeds to Nogales for lunch, then back via Rio Rico; free. Call 490-3997 for information.