New Mexico · Area of Critical Environmental Concern
Mathers Research Natural Area
BLM found a natural system, a wildlife resource and a natural process here, and its plan calls for special management. BLM's records place no claim, lease or right of way inside the line today, and two grazing allotments cover part of it. It covers 242 acres and was designated June 17, 2010, in the Roswell RMP. In the plan's name, RMP stands for resource management plan.
One of the 1,120 places the Bureau of Land Management has designated an Area of Critical Environmental Concern. This page shows its line, what BLM found there and what sits inside it.
The line
Ground: USGS The National Map, topographic tiles. Boundaries: BLM's own, read Oct 20, 2026. The 2 grazing allotments below aren't marked.Grazing allotments
2 grazing allotments cover part of this line. Their permittees aren't named here yet.
- Sand Ranch27,038acres
- North ACEC24,755acres
The nearest areas
- Lesser Prairie Chicken Habitat PreservationNew Mexico · 57,564 acres · 2 oil and gas leases, 22 rights of way, 9 grazing allotments covering part of it2miles
- Mescalero SandsNew Mexico · 10,002 acres · 4 grazing allotments covering part of it13miles
- Overflow WetlandsNew Mexico · 6,637 acres · 5 rights of way, 3 grazing allotments covering part of it33miles
- North Pecos RiverNew Mexico · 6,477 acres · 4 grazing allotments covering part of it42miles
- Roswell Cave ComplexNew Mexico · 37,689 acres · 8 oil and gas leases, 13 rights of way, 21 grazing allotments covering part of it68miles
More from BLM's New Mexico office
Every area BLM's New Mexico office holdsThe proposed rule
A proposed rule, RIN 1004-AF53, would change how BLM drafts every land use plan, and how it designates ACECs like Mathers Research Natural Area. The comment window hasn't opened: the proposed rule wasn't in the Federal Register at our last check. The Watch sends one email the day it prints.
The rule's abstract
The purpose of this rulemaking is to establish in regulations an updated process for the approval of the development, revision, amendment, and maintenance of land use plans, as provided for by the Federal Land Policy and Management Act of 1976, for public lands administered by the Bureau of Land Management (BLM). Additionally, this rulemaking will provide clarification of the process the BLM uses for designating Areas of Critical Environmental Concern.Unified Agenda entry for RIN 1004-AF53, Publication ID 2026, reginfo.gov (OMB OIRA), read Oct 18, 2026