American River
The North Fork is the longest tributary of the American River, at . It begins at an elevation of about near Lake Tahoe in Placer County at Mountain Meadow Lake, just northeast of Granite Chief and immediately due west of Squaw Valley Ski Resort. It flows westward through remote wilderness areas.
Knight's Ferry Bridge
The Knight's Ferry Bridge, spanning the Stanislaus River at Knights Ferry, California, is the longest covered bridge in the United States. It was designated a U.S. National Historic Landmark in 2012.
It was for a long time known as the longest covered bridge west of the Mississippi, and since the 2011 destruction of Old Blenheim Bridge in New York State, which had approximately the same length, is undisputed as the longest in the U.S.