Longmont, CO Fire Regulations: Outdoor Burning (2026)

Longmont Fire Services states: 'Open burning is prohibited within Longmont city limits unless specifically allowed under these regulations or permitted by the Longmont Fire Department. No burning of any kind is allowed on Red Flag days.' Burning leaves, trash, yard vegetation, or household waste as a disposal method is not allowed inside the city. Limited exceptions exist for recreational fires (max 3 ft diameter, 2 ft height of natural untreated wood) and for permitted bonfires (max 8 ft diameter, 4 ft height, 50 ft from structures, inspected by Fire Codes and Planning prior to ignition). Prohibited fuels include plastics, garbage, construction waste, wire insulation, rubber, petroleum-based products, animal waste, food service or industrial waste, and yard vegetation, leaves, or debris. The Longmont Public Safety Department's Codes and Planning Section enforces these rules under the 2021 IFC adopted via Ordinance O-2021-66 (LMC Chapter 16.32). State law allows the Boulder County Health Department and the Colorado Department of Public Health and Environment to declare additional outdoor burning bans during high fire weather.