In the municipality of San Martín Sacatepéquez, a red pick-up truck is being loaded with pilgrims. Its front bumper is adorned by a sculpted bull’s head with real horns. A broken siren announces the truck will begin its charge up the slopes of Chicabal Volcano, located 220km west of Antigua Guatemala. After a 20 minute drive through the cloud forest on the volcano, the pilgrims will join a larger group of people gathered to at the summit to ask the local deities for rain.