Sturgeon v. Frost
The Court ruled that Alaska's Nation River is not federal "public land," and that a special provision of a 1980 Alaska lands law shields state, Native, and privately owned lands and waters inside Alaska's national parks from the Park Service's usual rules — so the agency could not stop a hunter from using his hovercraft there.
The decision confirms that Alaska's unique history of drawing park boundaries around non-federal land does not automatically hand the Park Service regulatory power over that land, preserving a distinct legal landscape for millions of acres of state, Native, and private property inside Alaska's park boundaries.
“That means Sturgeon can again rev up his hovercraft in search of moose.”
The Court's plain-spoken summary of the practical result of its ruling.
How it got here: After an earlier Supreme Court ruling rejected the lower courts' reasoning and sent the case back, the Ninth Circuit again ruled against Sturgeon, and he again sought Supreme Court review.
The Case in Depth
What happened
John Sturgeon hunted moose for decades along Alaska's Nation River, traveling by hovercraft through a stretch of river inside the Yukon-Charley Rivers National Preserve. Park rangers told him hovercraft use was banned under a nationwide Park Service rule. Sturgeon argued that a 1980 Alaska land law meant the Park Service couldn't enforce that rule on a river the federal government doesn't own.
The question before the Court
Could the National Park Service ban John Sturgeon's hovercraft on a river in Alaska that the federal government doesn't actually own?
The Court's answer
No — the Court ruled the Park Service could not ban Sturgeon's hovercraft, because the Nation River is not land the federal government owns or holds a regulable interest in, and a special provision of Alaska's 1980 lands law (ANILCA) exempts state, Native, and private land and water inside Alaska's national parks from the Service's ordinary rules.
The Court found that flowing water can't be "owned," Alaska holds title to the riverbed, and a claimed federal water right would only protect against depletion, not authorize a hovercraft ban. It then read ANILCA's Section 103(c) to legally place non-federal land and water outside park boundaries for regulatory purposes, even though they sit inside a park's mapped lines, so the Park Service's usual authority doesn't reach the Nation River.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Landowners, Alaska Native corporations, and the State of Alaska retain control over millions of acres of land and rivers that sit inside national park boundaries but are not federally owned, without automatically becoming subject to Park Service regulations. Alaskans who rely on rivers for hunting, fishing, and transportation gain more certainty that National Park Service rules designed for federally owned parkland don't reach their property.
What changes now
The case returns to the lower courts, but the Supreme Court's ruling on the merits is final: the Park Service cannot enforce its hovercraft ban on the Nation River. The decision leaves open other possible sources of Park Service authority over Alaska's navigable waters — such as regulating out-of-park areas to protect adjacent parkland, or authority over rivers specially designated as Wild and Scenic — which were not decided here and could be litigated in future cases.
What this does not decide
The Court did not decide whether the Park Service has any other authority to regulate navigable rivers in Alaska's parks, such as power to protect adjacent public parkland from pollution originating on a river, or authority over rivers specially designated as "Wild and Scenic Rivers." Those questions were expressly left open.
Concurrences and dissents
Concurrence — Justice Sotomayor
Justice Sotomayor agreed the Nation River isn't parkland but stressed the ruling doesn't strip the Park Service of all power over Alaska's rivers. She argued the Service likely retains authority to regulate non-public rivers when necessary to protect adjacent public parkland, and probably keeps full authority over rivers specially designated as Wild and Scenic Rivers, since Congress could not have meant to leave rivers wholly unprotected.
How the Court got there
The legal reasoning, step by step
- The Court first asked whether the Nation River counted as "public land" under the Alaska National Interest Lands Conservation Act (ANILCA), which would put it automatically under Park Service control; that definition requires the United States to hold "title" to the land, water, or a specific interest in it.
- Because flowing water cannot be owned and Alaska (not the federal government) holds title to the riverbed under the Submerged Lands Act, the Court rejected the government's fallback argument that a federal "reserved water right" — a doctrine letting the government keep enough water to fulfill a reservation's purpose — made the river "public land," since that right, even if it existed, only protects against water depletion and has nothing to do with banning hovercraft.
- The Court then read ANILCA's Section 103(c), which says non-federal lands within Alaska park boundaries are "deemed" outside the unit and are not subject to regulations that apply "solely" to public lands — meaning the section legally excludes state, Native, and private land (and, since ANILCA defines "land" to include water, rivers too) from ordinary Park Service authority even though they sit inside a park's map lines.
- The Court rejected the Park Service's narrower reading, under which the exemption would only block rules explicitly limited to public land, because that reading would let the agency regulate any inholding simply by writing a regulation that covers both federal and non-federal land alike, draining the exemption of any real effect.
- Applying that understanding to navigable waters specifically, the Court found nothing in ANILCA's statements of purpose or specific river-related provisions strong enough to override the statute's express definition treating land and water the same way, so the general exemption for non-public land covers the Nation River as well.
Doctrinal impact
Cases affected by this decision
Reaffirms Cappaert v. United States (426 U. S. 128)
The Court relied on this case's rule that reserved water rights cover only the specific amount of water needed for a reservation's purpose.