1. Before you can locate a claim, you must determine if the lands are open to mining. You can find this out at any BLM office. No claims can be staked in areas closed to mineral entry under certain acts, regulations, or public land orders (such areas are referred to as withdrawn lands). The BLM Colorado State Office and field offices have appropriate land and mineral status maps and records for you to make this determination.
2. On lands open to location, you may prospect and properly locate claims and sites. If lands have already been claimed, you may want to find another location. The Colorado State Office maintains a record of these locations on their LR 2000 database.
3. If your parcel of land is open to location, the next step is staking the claim. Federal law specifies that claim boundaries must be distinctly and clearly marked to be readily identifiable. Colorado statutes have more detailed requirements for marking boundaries. For specific state requirements ask for Circular No. 3, available through the Colorado Division of Minerals and Geology.