Guadalajara has several very well organized clubs specializing in outdoor activities like hiking, camping and mountain-climbing. These clubs offer excursions every single weekend of the year and their members get to see natural marvels that most tourist guidebooks never mention (except my book, Outdoors in Western Mexico, of course!). Some of these groups have been around for a long time, so today’s members benefit from discoveries of little-known sites made by other members decades ago. This year, three of the biggest clubs are celebrating their anniversaries. CEO (Cuerpo de Exploradores de Occidente) is 75 years old, Grupo Montañista Colli is 50 and Club Excursionista Huicholes Jalisco is celebrating its 41st anniversary.