Sea Lion Caves 120 mi
A sea cave on Highway 101 north of Florence where an elevator takes you down to watch the sea lions, which are mostly inside the cave in winter and spring.
Florence, OR, from $18
Caves near Portland, OR
3 show caves with public tours within 250 miles of Portland. The closest is Sea Lion Caves, about 120 miles away.
Distances are straight-line miles from downtown Portland; driving takes longer. Tour details checked 2026-10-22 against each cave's own site.
Fort Rock Cave 167 mi
An archaeological cave in Oregon visited only on reserved state park tours from late April to June; its location isn't shared.
Oregon
Oregon Caves National Monument 239 mi
A national monument cave in Oregon toured on 90-minute ranger-led Discovery tours from late March to early November.
Oregon, from $20