Banks in Mammoth Lakes, California, the US. Banks locations in Mammoth Lakes, California. Find the nearest banks locations, near you. All types of business services Accounting ATM Bank Courthouse Finance Insurance Lawyer Real estate School Travel All banks in Mammoth Lakes Oak Valley Community Bank Finance Bank +1 760-924-0990 307 Old Mammoth Road, Mammoth Lakes, California 93546 Write a review Phone Website Directions