Past Newbury Park's Hill Canyon, the creek meets with Arroyo Santa Rosa in Santa Rosa Valley as it runs through the Pleasant Valley basin on its way across the Oxnard Plain to its estuary at Mugu Lagoon.

Due to limited access, suggestions have been made to make its banks into public amenities similar to that of San Antonio River Walk, or, developing a public use trail following the creek, similar to the bike path of Arroyo Simi in Simi Valley, California.

Its southern boundary is compromised by the Santa Monica Mountains to the southwest and the Simi Hills to the southeast.

[18] Some of the fauna found in the creek includes the Western pond turtle and numerous species of amphibians: the California red-legged frog, Western toad, American bullfrog, California toad and the Pacific tree frog.

Fish species include the Brown bullhead, Green sunfish, Bluntnose minnow, and Mosquitofish.