Derek Larson, who used to trade as El Camino Viejo Adventures, guides private tours and hikes out of Jalpan in English and Spanish. He publishes no street address, so the pin is on the town.
The list is the Sierra Gorda's best: the viewpoint at Cuatro Palos, El Chuveje waterfall, the rock arches of Los Arquitos, the rim of the Sótano del Barro sinkhole where military macaws nest, the Cañón del Infiernillo and the five Franciscan missions. There are also scheduled group treks and backcountry hikes along the Río Santa María. His site notes that Puente de Dios, at Pinal de Amoles, is currently closed.