Lost Creek is a tributary of the Middle Fork Willamette River in the U.S. state of Oregon.

It begins in the Cascade Range foothills between Dorena Lake and Lookout Point Lake and flows generally north to meet the river downstream of Lowell.

Along the way, it passes by the rural community of Dexter, then under Oregon Route 58, and through part of Elijah Bristow State Park.

The 75-foot (23 m), single-lane structure carries Parvin Road over the water.

[5] Built in 1921, it was added to the National Register of Historic Places in 1979.