Reward / Brown Monster Mine An abandoned gold mine in the Eastern California mountains with an extensive underground network of tunnels and adits. The site today known as the Reward Mine is made up of multiple mining claims that have merged over time, though which today sit in a mostly abandoned state. Following its discovery in 1870, the Reward Mine primarily produced gold and silver, with copper and lead being secondary minerals mined from the mountain shafts located in the Eclipse Canyon area of California's Inyo Mountains overlooking the Owens River Valley. At an elevation of 4000', the Reward Mine sat adjacent to ...