Boundary Dam is .5 mi. w. on SR 31 to Metaline, then 11.5 mi. n. via Boundary Rd. to Boundary Dam Access Rd., following the w. bank of the Pend Oreille River. This 340-foot-tall dam features a visitors' gallery within a limestone cavern.
Note: For security reasons, a photo ID is required for all adults.
Guided tours are available. Time: Allow 1 hour minimum.