I toured the entire Lost Coast over two days last weekend from the Mattole River at the north end in the King Range to Usal Beach at the south end in the Sinkyone Wilderness. The King Range beach walk is 24.6 miles and the Sinkyone run from Hidden Valley to Usal was ~28 miles. Check out the links below for photos and videos. Let me know if you have any questions about our route/conditions.
Day 1 - King Range Beach Walk
Day 2 - Sinkyone Wilderness Adventure Run