Lost Creek Lake

Prospect, Oregon

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This site was last sampled by Rogue Riverkeeper on 8/24/22. During 2022, according to Rogue Riverkeeper's sampling this site met the OR standard for water contact safety 7 out of 7 times. This first sampling event of the season was 6/28/22.

Hours: Open all hours.

Amenities: Lost Creek Lake is a reservoir located 30 miles northwest of Medford on the Rogue River in Jackson County, Oregon, and is a popular destination for fishing, boating, and swimming.

Directions: From Medford, go approximately 35 miles north on Highway 62 towards Crater Lake. Look for the first sign for Joseph Stewart County Park when coming from the south (Medford/Shady Cove), and stay left to go to the swimming beach. To get to the marina and boat launch, take a right after exiting the highway.

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Water Quality

Passed water quality tests at least 95% of the time
Historical Status
This status is based on the latest sample, taken on August 24th, 2022. Rogue Riverkeeper updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on August 25th, 2022 at 5:08 PM.

For water quality icon legend, click:

Current Weather

13°C

A mix of sun and clouds

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Monitoring Frequency

Source Information

Water samples are collected by Rogue Riverkeeper volunteers and our Water Quality intern tests them in our lab which meets the OR Dept. of Environmental Quality data standards. Results are then posted to this page so you will know when it is safe (or unsafe) to swim!

Oregon state criteria for whether a water sample meets the water quality standard for contact is an E. coli result of 406 MPN/100mL per sample or less. Water samples are collected, then sealed and incubated over a 24-hour period at 35+/- degrees Celsius. The results are considered valid for 7 days.

Results based on the Oregon water quality criteria of 406 MPN/100mL are organized as follows:

GREEN = a single sample is below the Oregon water quality criteria for water contact

RED = a single sample exceeds the Oregon water quality criteria.. People and pets should not be recreating in sites labeled red as bacteria levels are considered unsafe for human contact.

GREY = a site with no current data available.

Always use your best judgement when recreating in or near waterways. Pay attention to odd smells, colors, water quality, etc and report anything that looks out of the ordinary.
Be safe, have fun, and thank you for protecting the Rogue!

Water Quality Graph