Idaho’s larger lakes — Coeur d’Alene, Pend Oreille, Priest, and other navigable waters — are owned by the State below the natural or ordinary high water mark (OHWM), held in trust for the public under the public-trust and equal-footing doctrines (Idaho Code §§ 58-104, 58-1202). That means a private waterfront parcel typically extends only to the OHWM, not out into the lake; the submerged land beyond it is state-owned. What you do hold as an abutting owner are ‘littoral rights’ — protected rights to maintain your adjacency to the water and to make use of it, including building aids to navigation like a dock, subject to permitting. The exact location of the OHWM, and what’s included, can affect buildable area, setbacks, and dock rights, so on a waterfront purchase it’s worth reviewing the survey, the title commitment’s exceptions, and any existing permits carefully.