BLM National Website: Best Management Practices for Oil and Gas Development
http://www.blm.gov/bmp/index.htm

BLM Colorado Website for Oil and Gas Lease Sales: View Lease Sale Notices, Schedules, etc.
http://www.co.blm.gov/oilandgas/leasinfo.htm

Information Regarding BLM Split-Estate Policies and Practices.
http://www.blm.gov/bmp/Split_Estate.htm

BLM Interactive Map Site: Search, locate, and map the BLM's land and mineral use records including: Oil & Gas, Agreements, unpatented Mining Claims, and cases that affect the status of the land. Quick access to BLM's LR2000 serial register reports.
http://www.geocommunicator.gov/GeoComm/index.shtm

State of Colorado Site: Colorado Oil and Gas Conservation Commission
http://www.oil-gas.state.co.us/

Regional information on USDA Forest Service parcels
http://www.fs.fed.us/r2/resources/mgr/minerals/lease_sales/lease_sale_by_state/r2_states