Colorado · Area of Critical Environmental Concern
Trickle Mountain ACEC
BLM's map records no relevance finding for this one. BLM's records place 4 rights of way inside the line today, and 13 grazing allotments cover part of it. It covers 43,857 acres and was designated December 18, 1997, in the 1997 San Luis 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
The rights of way
4 rights of way sit inside the line. BLM files 3 under non-energy facilities and 1 under other energy facilities.
- PUBLIC SERVICE COMPANY OF COLORADO1right of way
- CENTURYTEL OF EAGLE INC1right of way
- SAGUACHE COUNTY (Colorado)1right of way
- USFS (R2 ROCKY MOUNTAIN REGION)1right of way
Grazing allotments
13 grazing allotments cover part of this line. Their permittees aren't named here yet.
- Allotment USFS-GRZ-10157.01035350,708acres
- Allotment USFS-GRZ-10162.01035334,815acres
- Allotment USFS-GRZ-10158.01035320,621acres
- Trickle Mtn20,265acres
- Allotment USFS-GRZ-10154.01035316,605acres
- Poison Gulch13,047acres
- Allotment USFS-GRZ-10135.01035310,668acres
- Cross Creek7,745acres
- Sheep Creek2,101acres
- Rob Ranch1,291acres
- Tuttle Creek1,160acres
- Meadow Fenced F.R.122acres
- Flickinger Ind. F.R.88acres
The nearest areas
- Elephant Rocks ACECColorado · 1,845 acres · a grazing allotment covering part of it29miles
- Castle Gardens ACECColorado · 310 acres · 2 grazing allotments covering part of it31miles
- Droney Gulch ACECColorado · 674 acres · 2 rights of way, 2 grazing allotments covering part of it31miles
- Chance Gulch ACECColorado · 13,804 acres · at least 3 active mining claims, 6 rights of way, 3 grazing allotments covering part of it35miles
- South Beaver Creek ACECColorado · 4,545 acres · 1 right of way, 2 grazing allotments covering part of it37miles
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 Trickle Mountain 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