For most Baja road-trippers making their way down the peninsula, foggy Guerrero Negro (pop. 12,000) looms as a stopover town for refueling vehicles, loading up on supplies, and crashing for the night.
By Air: Aereo Servicio Guerrero (tel. 615/157-0137, toll-free 800/823-3153, www.aereoserviciosguerrero.com.mx ) operates flights to and from Isla Cedros  four times a week (Mon., Wed., Thurs., Fri.). The flight time is about 30 minutes, and a one-way ticket runs US$65; the airline office, next to the police station on Boulevard Zapata, is open 9 A.M.–4 P.M. Monday–Saturday. The company also does charters upon request and flies to other destinations within Mexico such as Ensenada  (US$137) and the Pacific coast of the mainland.
Guerrero Negro’s airfield is located north of town, near the state line. Look for the turnoff between Km. 125 and 126.
By Bus: Guerrero Negro’s bus station is located on Boulevard Zapata across from Malarrimo Restaurant. Aguila (tel. 800/824-8452, www.autotransportesaguila.com ) and Autotransportes de Baja California (ABC, tel. 800/025-0220, www.abc.com.mx ) offer daily service north to Punta Prieta , El Rosario  ($40) San Quintín , Ensenada , and Tijuana  (US$80), and south to Vizcaíno  (US$8), San Ignacio  (US$17), Santa Rosalía  (US$25), Mulegé  (US$33), Loreto  (US$49), Ciudad Constitución  (US$67), and La Paz  (US$90).