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A portion of the Salt Lake Valley with Oquirrh Mountains in the background as seen looking southwest from City Creek Canyon.

Salt Lake Valley from space.

Greatest vertical relief in the valley. Twin Peaks has a rise of 7099 ft or 2164 m from the valley floor.

Salt Lake Valley is a 500 square mile valley in Salt Lake County in the north-central portion of the U.S. state of Utah. It contains Salt Lake City and many of its suburbs, notably West Valley City, Sandy, and West Jordan; its total population is 948,172 as of 2005.

The valley is surrounded in every direction except the northwest by steep mountains that at some points rise 7,100 ft from the valley floor's base elevation. It lies nearly encircled by the Wasatch Mountains on the east, the Oquirrh Mountains on the west, Traverse Ridge to the south and the Great Salt Lake on the northwest, with the peaks of Antelope Island visible.

Every entrance into the valley is extremely narrow and often congested. They include the Point of the Mountain to the south via the Jordan Narrows, a gap in the Traverse Mountains, narrow entrances between the Great Salt Lake and Oquirrh Mountains to the northwest and the Great Salt Lake and the Wasatch Mountains to the north, and several canyons to the east including Parley's Canyon and Emigration Canyon.

The Jordan River runs north through the valley between Utah Lake and the Great Salt Lake bisecting the valley, and along with numerous mountain streams and reservoirs, provides irrigation water to the rapidly-growing valley. The only areas that have not been urbanized are near the Great Salt Lake (prevented by frequent flooding) and in the far west and mid-southwest parts of the valley, although even those areas are beginning to experience the effects of the Salt Lake City urban area's rapid expansion. Some experts are claiming that the valley will be urbanized rim-to-rim within the next 50 years^{[citation needed]}.

A company known as Kennecott Land, which owns the eastern foothills of the Oquirrhs in the western part of the valley, recently drafted a plan that would develop the rest of the entire valley within 75 years, adding at least 500,000 residents. The first development, known as the Daybreak Community, has already begun construction. It will focus on transit-oriented development and will also feature a ski resort in the Oquirrh Mountains and a university campus.

Interstate 15 runs north to south through the middle-eastern portion of the valley and Interstate 80 runs east to west in the northern quarter of the valley from Parley's Canyon into Tooele County to the west (where it cuts across a portion of the Great Salt Lake). The Interstate 215 belt route, Utah State Route 154, Bangerter Highway, and Utah State Route 201 are also major transportation routes. The Utah Transit Authority operates an extensive bus system across the Wasatch Front, including the Salt Lake Valley, in addition to two light rail lines (known as TRAX) in the valley. One runs from the Delta Center in downtown Salt Lake City south to Sandy, while another runs east to the University of Utah. A third line extending from Murray through West Jordan to the Daybreak Community in South Jordan has been approved. A commuter rail line north to Pleasant View in Weber County is currently under construction.

• Mormon Trail