Modeled after Gravity in Bolivia, this Colombian-Ecuadorean-owned extreme-mountain-bike company offers a 50km downhill adrenaline overdose on two wheels through the Cañón del Río Suárez (with a stop in Barichara) or the equally spectacular Cañon de Chicamocha. It's an all-day affair that takes in absolutely epic countryside. Lunch is included; a celebratory beer is de rigueur.
There's no physical office in San Gil. Book via the website.