The desert is amazing just off the unimproved road that goes from the main highway to the Mission at San Borja, a few miles north of Bahia de Los Angeles:
Several similar but recognizably different hook-spined mammillarias grow under brush and in rock cracks here as well, but all the pictures came out very blurry.
South of Bahia de Los Angeles there are some amazing desert environments also, on the road to La Mona:
(including the first appearance of huge stands of Opuntia invicta).
Peterb