Running Springs is a census-designated place in San Bernardino County, California, United States. The population was 4,862 at the 2010 census, down from 5,125 at the 2000 census. Running Springs is situated 17 miles west of Big Bear Lake, CA.Running Springs is home to the 3,400-acre National Children’s Forest, which offers interpretive programs, educational tours and more. Snow Valley Mountain Resort was established here in the 1920’s and was the first ski resort in the San Bernardino Mountains.