Claim: Las Vegas is in the Rocky Mountains.
Evidence: Las Vegas -LRB- -LSB- lɑːs_ˈveɪɡəs -RSB- , Spanish for `` The Meadows '' -RRB- , officially the City of Las Vegas and often known simply as Vegas , is the 28th-most populated city in the United States , the most populated city in the state of Nevada , and the county seat of Clark County.