Idaho · Area of Critical Environmental Concern
Upper Lolo Creek
BLM found a natural system, a wildlife resource, a cultural value, a scenic value and a fish resource here, and its plan calls for special management. BLM's records place 8 rights of way inside the line today, and five grazing allotments cover part of it. It covers 1,626 acres and was designated December 21, 2009, in the Cottonwood RMP 2009. 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
8 rights of way sit inside the line. BLM files 6 under non-energy facilities, 1 under other energy facilities and 1 under none.
- NEZ PERCE TRIBE2rights of way
- CLEARWATER POWER CO1right of way
- Holder not listed by BLM1right of way
- IDAHO DEPARTMENT OF TRANSPORTATION1right of way
- Old Pilot LLC1right of way
- NORTHWEST FIBER , LLC DBA ZIPLY FIBER1right of way
- LOLO CREEK RANCH INC1right of way
Grazing allotments
5 grazing allotments cover part of this line. Their permittees aren't named here yet.
- Lacy Meadows805acres
- Paul173acres
- Incendiary Creek138acres
- Cottonwood Flats69acres
- Yanks Creek37acres
The nearest areas
- Lower Lolo CreekIdaho · 3,679 acres · 5 grazing allotments covering part of it11miles
- East Fork American RiverIdaho · 569 acres · 2 grazing allotments covering part of it36miles
- American River Historic Sites DistrictIdaho · 6,347 acres · at least 98 active mining claims and 79 more BLM lists as Filed, 24 rights of way, 5 grazing allotments covering part of it38miles
- Lower Salmon RiverIdaho · 14,367 acres · 11 rights of way, 27 grazing allotments covering part of it40miles
- Cottonwood Islands RNAIdaho · 43 acres · nothing placed inside42miles
More from BLM's Idaho office
Every area BLM's Idaho 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 Upper Lolo Creek. 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