[903] Blue Mountains, so v.w. Blaues Gebirge.
Brockhaus-1911: Blue Mountains · Blue Ridge · Rocky Mountains · Ozark Mountains · White Mountains · Saguache Mountains · Cumberland Mountains · Cedar Mountains · Hoosac Mountains · Green Mountains
Herder-1854: Blue pills, blue stockings · White Mountains · Rocky Mountains
Meyers-1905: Blue John-Mine · Blue Island · Blue pills · Blue-Stocking · Blue Ridge · Big Blue River · Blackley blue · Blue Anchor-Line · Rocky Mountains · Hoosac Mountains · Ozark Mountains · San Juan Mountains · Wahsatch Mountains · White Mountains · Uintah Mountains · Catskill Mountains · Black Mountains · Big Horn Mountains · Cedar Mountains · Green Mountains · Elk Mountains · Cumbrian Mountains
Pierer-1857: Blue Stockings · Blue River · Mecklenburg blue · Lower Blue Lick · Blue Ridge · Blue Earth · Blue Fields · Blue Pills · Blue Hills · Rattle Snake Mountains · Ragged Mountains · Peter-Mountains · Potatoe Mountains · Wahsatch Mountains · White Mountains · Wind River Mountains · Rocky Mountains · Schooley's Mountains · Stony Mountains · Green Mountains · Humboldt River Mountains · Cumberland-Mountains · Cerne Mountains · Cobequid Mountains · Lukkee Mountains · Ozark Mountains · Kittatinny Mountains · Iron Mountains · Kayaderosseras Mountains