The Reto BTT Sendas del Guadalete is a mountain bike event held in Puerto Serrano, within the province of Cádiz. It offers two off-road ride options: a 63 km BTT route and a 32 km BTT route.
Both distances are presented as non-competitive, framing the event as a shared cycling challenge rather than a contest for rankings. This format is suitable for cyclists seeking a marked BTT experience along the Guadalete trails without the pressure of a timed competition.