This plant has been recorded in only a few general areas, including Tujunga Wash and the floodlands surrounding the Santa Ana and San Jacinto Rivers.
The planned site for the Mission was along the banks of the Río de los Temblores (the River of the Earthquakes—the Santa Ana River).
The largest populations with the most area of suitable habitat are located near the Santa Ana River, Lytle and Cajon Creek, and the San Jacinto River.
The Catostomus santaanae range is extremely restricted; they are native only to the Los Angeles, San Gabriel, Santa Ana, and Santa Clara River systems in Southern California.
Mississippi River | River Thames | Santa Cruz de la Sierra | Amazon River | Columbia River | Santa Cruz | Santa Barbara, California | Santa Fe | Hudson River | Colorado River | Potomac River | Santa Fe, New Mexico | river | Ohio River | Santa Barbara | Santa Claus | Santa Catarina (state) | Missouri River | Delaware River | Murray River | River Tyne | Santa Catarina | Madeira River | University of California, Santa Cruz | Volga River | River Nene | River Clyde | River Trent | River Severn | University of California, Santa Barbara |
The trail of the stolen band of horses was followed across the Santa Ana River, eastward through what is now Villa Park and up the Santiago Canyon to the mouth of Canyon de los Indios...
In January 2005, he was appointed to the Orange County Transportation Authority (OCTA) and served on the Foothill/Eastern Corridor Joint Powers Authority, on the Orange County Sanitation District, as a Director of the Ground Water Replenishment System, and as a Member of the Santa Ana River Flood Protection Agency.
5) The Bureau of Land Management set aside three areas along the Santa Ana River for preservation of federally listed species such as D. m. parvus, the Santa Ana River Woolly Star (Eriastrum densifolium ssp. sanctorum), the Slender-Horned Spineflower, and the California Gnatcatcher.