Colombia is not the easiest of countries for cyclists, though the sport is wildly popular in certain regions (Boyacá, for example).
Road rules favor drivers and you'll end up fighting traffic on main roadways. Never assume that a driver will give you right of way.
On the plus side, most roads are paved and security is improving. Even the smallest towns will have a repair shop and you can get your bike fixed cheaply and easily.
Bike rentals are uncommon outside main traveler areas but you can buy a bike almost anywhere.
Colombian cities are becoming more bike-friendly, with new bike tracks, plus ciclovía in the likes of Bogotá and Medellín (the weekend closure of selected streets to cars and buses, making them tracks for cyclists and skaters instead).
Aeropuerto Internacional El Dorado (Bogotá) Buses (COP$2300) run every 10 minutes from 4:30am to 10:45pm; a taxi (COP$30,000 to COP$38,000) takes 45 minutes to the center.Aeropuerto Internacional José María Córdova (Medellín) Buses (COP$9500) leave every 15 minutes from 5am to 9pm; an Acoa Taxi...
Fast speedboats run from Turbo and Necocli in northern Antioquia to the towns of Capurganá and Sapzurro in the Caribbean, and in the Pacific from Bahía Solano to Nuquí.
Cargo boats ply the Pacific coast, with the port of Buenaventura as their hub. Travelers with sufficient time can get a bunk...