Arroyo de en Medio

Arroyo de en Medio (Spanish for "in the middle creek") is a 2.5-mile-long (4.0 km)[1] coastal stream in western San Mateo County, California.

The watershed of Arroyo de en Medio consists of relatively permeable sandy soils capable of significant recharge to its aquifers, which supply considerable potable water to the local area.

Arroyo is Spanish for creek; de en Medio means literally "of in between" but a closer more functional translation may be in the middle.

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[5]

Mouth of Arroyo de en Medio, where it enters the Pacific Ocean
Vegetation at the mouth of Arroyo de en Medio