The Bureau of Land Management (BLM) is an agency within the United States Department of the Interior that administers America's public lands, totaling approximately 253 million acres (1,020,000 km2), or one-eighth of the landmass of the country. The BLM also manages 700 million acres (2,800,000 km2) of subsurface mineral estate underlying federal, state, and private lands. Most public lands are located in western states, including Alaska. With approximately 10,000 permanent employees and close to 2,000 seasonal employees, this works out to over 21,000 acres (85 km2) per employee. the agency's budget was US$960,000,000 for 2010 ($3.79 per surface acre, $9.38 per hectare). The BLM's stated mission is to sustain the health, diversity and productivity of the public lands for the use and enjoyment of present and future generations.
The BLM Office of Law Enforcement & Security, headquartered in Washington, D.C., is a federal law enforcement agency of the U.S. government. All Law Enforcement Rangers and Special Agents receive their training through Federal Law Enforcement Training Center (FLETC). Law Enforcement Rangers attend the Land Management Police Training (LMPT) academy at FLTEC, while BLM Special Agents attend the Criminal Investigator Training Program (CITP) at FLETC. BLM Law Enforcement Rangers and Special Agents make up the law enforcement capability of the BLM. Rangers and Special Agents are located in each of the western states that have BLM lands. Law Enforcement Rangers make up the uniformed high visibility enforcement of laws. Special Agents investigate crimes against property, visitors and employees. Uniformed Law Enforcement Rangers enforce Federal laws and regulations governing BLM lands and resources. As part of that mission Law Enforcement Rangers carry firearms, defensive equipment, make arrests, execute search warrants, complete reports and testify in court. They establish a regular and recurring presence on a vast amount of public lands, roads, and recreation sites. The primary focus of their jobs is the protection of natural resources, protection of BLM employees and the protection of visitors. They use K-9s, helicopters, snowmobiles, dirt bikes and boats to perform their duties. Special Agents are criminal investigators who plan and conduct investigations concerning possible violations of criminal and administrative provisions of the BLM and other statutes under the United States Code. Special agents are normally plain clothes officers who carry concealed firearms, and other defensive equipment, make arrests, carry out complex criminal investigations, present cases for prosecution to U.S. Attorneys, and prepare investigative reports. Criminal investigators occasionally conduct internal and civil claim investigations.BLM Government Site
Follow the instructions at this link if you are interested in purchasing BLM land. BLM Land Sales