The Fillmore Field Office authorizes livestock grazing on approximately 4.7 million acres of public lands. In total, the Fillmore Field Office manages 170 allotments, which are held by 232 different individuals or corporations. Livestock grazing allotments average 30,000 acres. Grazing permittees purchase Animal Unit Months (AUMs) of livestock forage. An AUM is the amount of forage needed to sustain one cow and calf, five sheep, two burros, or one horse for one month. The majority of the allotments in the Fillmore Field Office are operating under a rotational grazing strategy which provides for plant recovery to enhance rangeland health. When rangelands are not meeting resource objectives, changes in grazing management are applied. Some small parcels of public land in the field office are reserved from grazing because of accessibility and/or to protect other resource values such as wildlife, riparian, recreation and water. The area is comprised of vegetation zones from salt desert shrub, sagebrush, pinion/juniper, to aspen-Douglas fir communities.

The U.S. Congress mandated that all grazing permits within BLM field offices be fully processed by fiscal year 2009, which ensures compliance with all applicable laws and regulations.  All 232 permits managed by the Fillmore Field Office have been fully processed under NEPA and renewed as "active."

The Fillmore Field Office is committed to collecting monitoring data, and developing grazing management systems to ensure that public lands here are being managed to guarantee the attainment of the Standards and Guidelines for Rangeland Health.