Colorado · Area of Critical Environmental Concern
North Sand Hills ACEC
BLM found a natural system here, and its plan calls for special management. BLM's records place no claim, lease or right of way inside the line today, and four grazing allotments cover part of it. It covers 487 acres and was designated June 19, 2015, in the 2015 Kremmling 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 4 grazing allotments below aren't marked.Grazing allotments
4 grazing allotments cover part of this line. Their permittees aren't named here yet.
- Sand Hills3,680acres
- Sand Creek1,707acres
- Adams Ind.868acres
- LOWER SAND HILLS539acres
The nearest areas
- Laramie River ACECColorado · 1,799 acres · 3 grazing allotments covering part of it11miles
- North Park Natural Area ACECColorado · 4,460 acres · 1 oil and gas lease, 3 rights of way, 11 grazing allotments covering part of it13miles
- Kremmling Cretaceous Ammonite RNA ACECColorado · 197 acres · 2 grazing allotments covering part of it45miles
- Kinney Creek ACECColorado · 588 acres · a grazing allotment covering part of it51miles
- Kremmling ACECColorado · 678 acres · 2 rights of way, 2 grazing allotments covering part of it52miles
More from BLM's Colorado office
Every area BLM's Colorado 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 North Sand Hills ACEC. 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