"United States. National Forest Service," . . "Trinity Lake (Calif.)" . . . . "Trinity Lake boating safety information and map : Whiskeytown-Shasta-Trinity National Recreation Area"@en . . . . . . . . . . "Maps"@en . "Thematic maps"@en . "California" . . "Boats and boating." . . "Boats and boating Safety measures." . . . . "Boats and boating Safety measures Maps." . . "Boats and boating California Trinity Lake Maps." . . "Shasta-Trinity National Forest (Agency : U.S.)," . .