Oregon · Area of Critical Environmental Concern
Tum Tum Lake
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 five grazing allotments cover part of it. It covers 1,695 acres and was designated July 15, 2005, in the Andrews Management Area 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 5 grazing allotments below aren't marked.Grazing allotments
5 grazing allotments cover part of this line. Their permittees aren't named here yet.
- PUEBLO LONE MTN224,177acres
- ORLANDO FFR8,458acres
- TUM TUM6,642acres
- STILL FFR3,213acres
- WILEY FFR1,154acres
The nearest areas
- Pueblo FoothillsOregon/Washington · 2,424 acres · a grazing allotment covering part of it3miles
- Borax LakeOregon/Washington · 600 acres · a grazing allotment covering part of it13miles
- East Fork Trout CreekOregon/Washington · 361 acres · a grazing allotment covering part of it18miles
- Serrano PointOregon/Washington · 679 acres · 2 grazing allotments covering part of it20miles
- Long DrawOregon/Washington · 441 acres · a grazing allotment covering part of it20miles
More from BLM's Oregon/Washington office
Every area BLM's Oregon/Washington 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 Tum Tum Lake. 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