She said the body was found about midday in the general area of Owl Creek Road and the South Yuba River, where 65-year-old Walter Steever's vehicle was found.
Steever left his San Jose home to work his Nevada County mining claim on Oct. 23. He failed to return home and his wife contacted authorities Monday.
Several agencies, including some from the Bay Area joined today in the ground and air search for Steever, according to a Nevada County sheriff's deputy.
Bee reporter Cathy Locke contributed to this report.