Secret Ravine is a perennial tributary of Miners Ravine which shortly thereafter runs into Dry Creek in Placer County, California. Its course lies within the cities of Rocklin, Loomis, and Roseville, as well as unincorporated parts of Placer County. It passes through the campus of Sierra College. Over its entire length the creek runs near the Interstate 80 freeway. It is an area becoming increasingly suburbanized. It was the site of placer mining operations during the California Gold Rush, and areas of tailings remain to this day. Later the drainage was a locale for granite quarrying.