Access to Miramar beach from State Route 1 requires a turn west on Magellan Avenue, then left on Mirada Road.
Arroyo de en Medio is a stream that cuts through a flat marine terrace plain emptying onto Miramar Beach.
Even at the mouth, Arroyo de en Medio is considered intermittent, since the flow typically ceases in the summer months.
Many orb web weaving spiders at the mouth indicates the abundance of insects utilized as prey by certain vertebrates such as salamanders, tree frogs, lizards, and many resident and migratory birds.
The mouth reach is classified as a riparian corridor under the strict meaning defined by the San Mateo County Local Coastal Plan.