A Uruapan guiding service that does one thing: Paricutín, the volcano that rose out of a cornfield in 1943. They publish no street address, so the pin is on Uruapan.
The choices are how far and how hard. The short one is the viewpoint at Angahuan; next is the walk or ride across the lava to the church of San Juan Parangaricutiro, its tower sticking out of the black rock; the full day goes up to the crater, either on horseback from Angahuan or on a longer hike from Nuevo San Juan. If you have your own car they will supply a guide alone.
They publish no email; bookings go by WhatsApp.