Question: What area does Salt Creek Falls and Multnomah Falls have in common?

Context paragraphs:
Warren Creek Falls (Oregon): Warren Creek Falls, was a waterfall located in the Starvation Creek State Park at the north skirt of the Columbia River Gorge, in Hood River County, in the U.S. state of Oregon.  It was located in a privileged area along the Historic Columbia River Highway, where several waterfalls are located in the Starvation Creek State Park, including Cabin Creek Falls, Lancaster Falls, and Starvation Creek Falls—all within 2 miles from each other.  It is frequently referred as the name for Hole-in-the-Wall Falls, a few yards downstream of Warren Creek.

Baker Creek Falls (Yamhill County, Oregon): Baker Creek Falls, is a waterfall located at the east end of the city of McMinnville, in Yamhill County, in the U.S. state of Oregon.  It is located off Baker Creek Road on the north skirt of Slide Mountain, five miles upstream from Ed Grenfell Park and the Miller Woods Conservation Area.  Other waterfalls surround Baker Creek, including Burton Creek Falls, Slide Mountain Falls and Gilbert Creek Falls; all of difficult access or located within private properties.

Prospect State Scenic Viewpoint: Prospect State Scenic Viewpoint, is a state park south of the community of Prospect on Oregon Route 62 in Jackson County, in the U.S. state of Oregon.  It was formerly known as Mill Creek Falls Scenic Area, a private hiking area that was developed by Willamette Industries along the Rogue River.  Both Mill Creek Falls and Pearsony Falls are contained within the area, with Barr Creek Falls close by.

Salt Creek (Middle Fork Willamette River): Salt Creek is a tributary, 30 mi long, of the Middle Fork Willamette River in Lane County in the U.S. state of Oregon.  It is named for salt springs along its banks that are used as licks by deer.  The stream originates as an outflow of Lower Betty Lake in the forested Cascade Range just southeast of Waldo Lake.  From its source, Salt Creek flows generally south, through Gold Lake, to Route 58, which it then follows mainly northwest for about 26 mi to its mouth at the Middle Fork Willamette River just below Hills Creek Dam.  At Salt Creek Falls—roughly 4 mi west of Willamette Pass and a little more than 22 mi upstream from the mouth—the stream plunges 286 ft , discharging an average of 50000 gal of water per minute, or 111 cuft/s .  Below the falls, the creek enters a narrow canyon shaped by glaciation and basalt lava flows from higher in the Cascades.  McCredie Hot Springs, at the former community of McCredie Springs, are natural hot springs along the lower half of Salt Creek beside Route 58.

Fish Creek Falls: Fish Creek Falls is a waterfall located about 5 miles to the east of Steamboat Springs, Colorado in Routt National Forest.  Fish Creek runs from several small lakes in the Rabbit Ears Range of Colorado.  In the summertime, the road to Fish Creek Falls becomes often clogged in mid-afternoon with tourists wanting to see the 283 ft waterfall.  It is possible to hike all the way to the terminus of the waterfall through giant boulders and rushing water.  There are two hiking trails from the parking lot at the end of Fish Creek Fall Road.  One is 1/4 of a mile (1/4 mi ) and goes through several Aspen groves with the occasional Subalpine Fir.  It ends at a viewing station where the entirety of the falls can be seen.  The other trail goes straight down into the U-Shaped valley formed by glaciers.  As it nears the bottom of the valley, one can hear the rushing sound of water over the fall and see beautiful Fish Creek.  The trail continues on to Upper Fish Creek Falls and then on to the Wyoming Trail, a long trail running the northwestern mountains of Colorado to Wyoming.  The falls provide a great place for ice climbing in the winter when 300+ inches of snow (300 in ) fall on the mountains east of Steamboat Springs.

Multnomah Falls: Multnomah Falls is a waterfall on the Oregon side of the Columbia River Gorge, located east of Troutdale, between Corbett and Dodson, along the Historic Columbia River Highway.

Coon Creek Falls: Coon Creek Falls, is a 250 ft plunge waterfall which shares a plungepool with Fall Creek Falls.  The falls are not always present, depending on the amount of precipitation in the area.  The falls are located near Spencer, Tennessee in Fall Creek Falls State Park.

Salt Creek Falls: Salt Creek Falls is a cascade and plunge waterfall on Salt Creek, a tributary of the Middle Fork Willamette River, that plunges into a gaping canyon near Willamette Pass in the Willamette National Forest, near Oakridge, Oregon.  The waterfall is notable for its main drop of 286 ft which makes it the third highest plunge waterfall in Oregon after Multnomah Falls and Watson Falls the second highest, which was re-measured in 2009 and found to be 293 feet rather than an earlier measurement of 272 feet passing Salt Creek Falls.  The pool at the bottom of the waterfall is 20 m deep.

Wolf Creek Falls (Oregon): Wolf Creek Falls, is a two tier waterfall located on the west skirt of the Umpqua National Forest, in Douglas County, in the U.S. state of Oregon.  It is located in a privileged area where rivers of the forest create several waterfalls: Cavitt Creek Falls, and Shadow Falls are within five miles of Wolf Creek Falls.  Grotto Falls is further to the east off Little River Road and National Forest Road 2703.

Starvation Creek Falls: Starvation Creek Falls, is a two tier waterfall located in the Starvation Creek State Park at the north skirt of the Columbia River Gorge, in Hood River County, in the U.S. state of Oregon.  It is located in a privileged area along the Historic Columbia River Highway, where four waterfalls are located in the Starvation Creek State Park: Cabin Creek Falls, Hole In the Wall Falls, Lancaster Falls, and Starvation Creek Falls—all within 2 miles from each other.

Supporting paragraphs: Salt Creek Falls Multnomah Falls
Answer: River