Washington State and a group of other Democratic-led states have dropped their lawsuit against oil drilling in the Arctic National Wildlife Refuge (ANWR) in Alaska, ending one of the remaining legal obstacles to development on the refuge's coastal plain.

The states filed the withdrawal in the ongoing litigation over the leasing program for the coastal plain, the 1.6-million-acre stretch of the refuge that Congress in 2017 directed to be opened to oil and gas leasing. The lawsuit had challenged the federal government's environmental review of the leasing program.

Alaska Beacon first reported the withdrawal.

The challenge was part of a broader web of litigation that has followed every lease sale and regulatory step in the refuge since the 2017 Tax Act mandate. Environmental groups, tribal organizations, and state governments have pursued separate suits against the leasing program and the underlying environmental reviews.

With the state coalition stepping aside, the legal fight over the coastal plain now rests largely with the remaining plaintiffs — primarily conservation and Indigenous organizations that have not signaled any retreat from the courtroom.

For operators and leaseholders in the coastal plain, the development removes one layer of legal risk, though it does not by itself resolve the broader questions hanging over the program: the durability of the environmental review, the status of future lease sales, and the economics of drilling a play with no established production history on the Alaska North Slope's eastern edge.

The timing matters for the basin. Activity on the North Slope has concentrated in the west — ConocoPhillips' Willow development in the National Petroleum Reserve-Alaska and continued appraisal of the Pikka and Peregrine areas — while the ANWR coastal plain remains undrilled. No operator has completed a well on the acreage held under existing refuge leases.

The withdrawal also fits a shifting posture among Democratic-led states on Alaska energy litigation, as the political landscape around Arctic drilling has changed in Washington.

What to watch: the remaining ANWR lawsuits and any move by the Interior Department to schedule a new lease sale in the coastal plain. A court ruling on the adequacy of the environmental review — or confirmation of a fresh sale — will determine whether the refuge acreage moves from legal limbo toward actual drilling programs.