| Lost Creek | |
| Name Etymology: | Probably for its relative seclusion[1] |
| Map Size: | 300 |
| Pushpin Map: | USA Oregon |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of the mouth of Lost Creek in Oregon |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Oregon |
| Subdivision Type4: | County |
| Subdivision Name4: | Lane |
| Source1: | Cascade Range foothills |
| Source1 Location: | near Mount June, between Dorena Lake and Lookout Point Lake |
| Source1 Coordinates: | 43.8044°N -122.7067°W |
| Source1 Elevation: | 3235feet[2] |
| Mouth: | Middle Fork Willamette River |
| Mouth Location: | downstream of Lowell |
| Mouth Coordinates: | 43.9492°N -122.8508°W[3] |
| Mouth Elevation: | 604feet |
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. Named tributaries of Lost Creek from source to mouth are Guiley, Gossage, Carr, Middle, Anthony, and Wagner creeks.[4]
Oregon Geographic Names (OGN) says the north–south valley through which the creek flows was known as Lost Valley during the days of early settlement. Illustrated History of Lane County says Elijah Bristow named the valley, according to OGN, which says the name probably stemmed from the valley's seclusion.[1]
The Parvin Bridge, a covered bridge, spans the creek south of Dexter. The 75feet, 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.[6]