|Elevation||318 ft (97 m)|
|Time zone||UTC-8 (Pacific (PST))|
|• Summer (DST)||UTC-7 (PDT)|
|GNIS feature ID||245216|
Lost Lake (also known as Lost Lake Resort and Lost Lake Landing) is a desert community located along the west shore of the Colorado River. It also lies along U.S. Route 95 near the northeast extent of Riverside County. Official U.S. Geological Survey feature ID is 245216 and NAD27 coordinates for the community are . The community lies at the foot of Riverside Mountain, , with a summit measuring 2,127 feet. The community is named for a lake, Lost Lake, located at .
The area has been assigned to part of the 92225 ZIP Code, which it shares with Blythe. The Census Bureau designates this area as rural. The area is part of the Lost Lake Directory Area in area code 760 and is included in the Mojave Desert Air Quality Management District.
The State Department of Fish and Game has been studying elf owl populations in the area.
This community is part of the Colorado River Indian Reservation (USGS feature 22753). The reservation was established on March 3, 1865. According to the National Geographic Names Database, residents are primarily Hualapai, Yavapai, Navajo, and Hopi.
Lost Lake Resort is a boating and camping community located along the Colorado River. The resort is described on their website as "A river front community and vacation resort on the Colorado River located just 31 miles north of Blythe CA on Hwy 95. Lost Lake River Resort is a popular destination for all water sport recreation. Everything from boating, wakeboarding, jet skiing, fishing, tubing, to water skiing."
Local services are a gas station, convenience store, fire station, church, and recreational center.