Federal Appeals Court Rules California Couple Can Build Home on Private Land Inside Glacier National Park
Why It Matters
A federal appellate ruling has clarified a significant jurisdictional question in Montana: state environmental law does not apply to privately owned land within Glacier National Park. The decision has broad implications for how state agencies may regulate so-called “inholdings” — parcels of private property that exist within federally managed park boundaries.
What Happened
John and Stacey Ambler, a California couple, purchased approximately half an acre of land along McDonald Creek near Apgar Village on the western edge of Glacier National Park in 2019. Before breaking ground, they consulted both the National Park Service and Flathead County, both of which indicated that no permits were required for residential construction on the site.
By 2023, the couple had erected a three-story structure on the creek bank. The visible construction drew complaints from local residents, prompting the Flathead Conservation District to investigate. The district determined the project violated Montana’s Streambed Act — commonly known as the 310 Law — and ordered the structure demolished and the riverbank restored.
The Amblers sued the conservation district in late 2023, arguing it lacked authority over federally ceded land. A federal district court sided with the couple. The Flathead Conservation District, along with the grassroots organization Friends of Montana Streams and Rivers, appealed that ruling.
Last month, a three-judge panel of the U.S. Court of Appeals for the Ninth Circuit affirmed the lower court’s decision, concluding that Montana had ceded jurisdiction over land within the park boundaries to the federal government in 1911 — an arrangement formally accepted by the United States in 1914.
The Legal Reasoning
The appellate panel held that while state laws in effect before 1911 could be enforced within the park, laws enacted afterward that were not part of the same regulatory framework as those pre-cession statutes could not apply. Montana’s Streambed Act was passed in 1975, more than six decades after the cession took effect.
“Federal authority became the only authority operating within the ceded area, including privately owned lands within the described park boundaries,” the judges wrote, quoting established legal precedent on federal jurisdiction over park inholdings.
The court further noted that the United States holds exclusive legislative jurisdiction over private inholdings within Glacier National Park, except for powers Montana explicitly reserved at the time of cession.
In a public statement, the Flathead Conservation District’s board said it “respects the Ninth Circuit’s decision and appreciates the legal clarification provided through this case.”
By the Numbers
- 1910: Glacier National Park established by Congress
- 1911: Montana cedes jurisdiction over park lands to the federal government
- 1975: Montana’s Streambed Act enacted — 64 years after cession
- 2019: Amblers purchase approximately half an acre near Apgar Village
- 2023: Three-story structure completed; conservation district orders demolition
Zoom Out
The ruling touches on a longstanding tension in public lands law: the existence of private parcels inside national park boundaries. Glacier National Park, particularly on its western edge near Lake McDonald, contains a number of these private inholdings — a legacy of land ownership patterns that predate the park’s creation. Courts have historically wrestled with how far state regulatory authority extends into federally controlled areas, and this ruling adds a new data point to that body of case law.
The debate also reflects a broader cultural friction in Montana’s Flathead Valley, where rapid growth, rising property values, and an influx of out-of-state buyers have strained relations between longtime residents and newcomers. Critics of the Ambler project framed it as an example of outside landowners sidestepping community norms; the couple’s defenders cast it as a straightforward property rights matter.
What’s Next
The partially completed home, visible from Camas Road, is expected to move toward completion now that the court has resolved the jurisdictional dispute. No further appeals have been announced. Federal land managers at the National Park Service may face questions about oversight of future construction on private inholdings within park boundaries, though the ruling does not require any specific federal action. The Amblers’ attorney had not responded to requests for comment as of publication.
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