CAUTION: Trail Work and Horses Present on Juniper Canyon and Tunnel Trails
Do not run or make loud noises near working horses. Only approach horses if directed to do so by trail work staff. If Horses are Approaching, find a safe place to step uphill and off the trail. Do not approach horses from behind (April 21 - 25)
Good water quality is important for the plants and animals of the riparian community. Fish, aquatic insects, amphibians, and perhaps endangered species could easily be affected by poor water quality. High bacteria counts have been observed in the Park. In 1972, E. coli counts as high as 16,000 ppm contributed to a die off of several mammal species. The US Public Health Service identified the culprit as infection due to the bacterium genus Arizona (closely related to genus Salmonella).
Domestic Water Supply
Did You Know?
Pinnacles National Park has the greatest number of bee species per unit area of any place ever studied. The roughly 400 bee species are mostly solitary; they don't live in hives.