Question: Rogers Pass  is traversed by a highway that begins near what Montana city?

Context paragraphs:
Rogers Pass (Montana): Rogers Pass rises 5610 ft above sea level and is located on the Continental Divide in the U.S. state of Montana.  The pass is adjacent to Helena National Forest and is traversed by Montana Highway 200.  Wide shoulders provide parking for those wishing to hike the Continental Divide Trail.  Bicyclists should note that the wide shoulders are limited to the very top and will not be found elsewhere on 200.  The pass is the best route between the cities of Great Falls and Missoula, Montana—more than 800 ft lower than Lewis and Clark Pass, 5.3 mi to the northwest, which was used by Meriwether Lewis of the eponymous expedition on July 7, 1806.  Rogers Pass is known for being the location of the coldest recorded temperature in the United States outside of Alaska.  On January 20, 1954, a temperature of -70 degrees Fahrenheit was recorded.

Raynolds Pass: Raynolds Pass, elevation 6844 ft , is a mountain pass on the Montana-Idaho border in the Rocky Mountains, United States.  The pass is on the Continental Divide, and is traversed by a state highway (Idaho State Highway 87 and Montana Highway 87).  The pass is named for Captain William F. Raynolds, an early explorer and officer-in-charge of the Raynolds Expedition of the Yellowstone region.  The pass is very gentle, with only a slight grade and no major hairpin curves to the highways connections with U.S. Route 287 in Montana and U.S. Route 20 in Idaho.

Blackfoot River (Montana): The Blackfoot River, sometimes called the Big Blackfoot River to distinguish it from the Little Blackfoot River, is a snow-fed and spring-fed river in western Montana.  The Blackfoot River begins in Lewis and Clark County at the Continental Divide, 10 miles (16 km) northeast of the town of Lincoln (4536 feet, 1382 m).  The river's headwaters are between Rogers Pass (5610 ft, 1710 m) to the north and Stemple Pass (6376 ft, 1943 m) to the south.  It flows westward through the town of Milltown and enters the Clark Fork River approximately five miles (8 km) east of the city of Missoula (3210 ft, 978 m).

A. B. Rogers: Albert Bowman Rogers (28 May 1829 – 4 May 1889), commonly known as Major A.B. Rogers, was an American surveyor now best remembered for his discovery of the Rogers Pass in British Columbia, Canada.  He also has the distinction of having Rogers Pass in the U.S. state of Montana named after him, following his description of the pass in 1887.

Elk Park Pass: Elk Park Pass, elevation 6352 ft , is a mountain pass on the Continental Divide in southwestern Montana, about 4 mi northeast of Butte.  It is traversed by Interstate 15 and is one of three crossings of the Divide by the Interstate (all in Montana), the others being Monida Pass (on the border with Idaho) and Deer Lodge Pass southwest of Butte.  Elk Park Pass lies on the border between Silver Bow and Jefferson counties and is remarkable for its highly asymmetrical nature.  The approach from the north is through namesake Elk Park, a high, mostly treeless plain (like South Park in Colorado or the Sierra Valley in California), and the grade is almost imperceptible.  The elevation at the northeast end of the park, about 10 mi from the pass, is about 6200 ft , only 152 ft lower than the pass itself.  However, at the south end, the highway drops 750 ft from the pass into Butte over a distance of only about 4 mi .

Grant-Frontier Park: Grant-Frontier Park is a park at Evans Ave. on the east bank of the South Platte River in southwest Denver, Colorado.  It is the site of the Montana City settlement.  The park was named in honor of Grant Junior High School (now Grant Middle School) whose teachers and students were responsible for discovering the site, cleaning and restoring it, and researching the history of Montana City.

Rogers Pass (British Columbia): Rogers Pass (elevation 1,330 m ) is a high mountain pass through the Selkirk Mountains of British Columbia used by the Canadian Pacific Railway and the Trans-Canada Highway.  The pass is a shortcut across the "Big Bend" of the Columbia River from Revelstoke on the west to Donald, near Golden, on the east.  The pass was discovered on May 29, 1881, by Major Albert Bowman Rogers, a surveyor working for the Canadian Pacific Railway.  A second pass was named for Rogers in 1887 in Montana, c.373 miles to the south-east.

Montana Highway 200: Montana Highway 200 (MT 200) in the U.S. state of Montana is a route running east-west covering the entire state of Montana.  From the starting point at ID 200, near Heron, Montana the highway runs east to ND 200 near Fairview, Montana.  It is part of a chain of state highways numbered "200" which extend from Idaho across Montana, North Dakota and Minnesota.  Montana Highway 200 is also the longest route signed as a state highway in the United States.

Chief Joseph Pass: Chief Joseph Pass el.  7251 ft is a mountain pass on the continental divide of the Rocky Mountains in the northwestern United States.  It separates Lemhi County, Idaho and Beaverhead County, Montana.  The pass is in the Bitterroot Mountains and is traversed by Montana State Highway 43.  The pass is named after Chief Joseph of the Wallowa band of the Nez Perce tribe who traversed the pass in 1877 during the Nez Perce War.

1910 Rogers Pass avalanche: The 1910 Rogers Pass Avalanche killed 62 men clearing a railroad line near the summit of Rogers Pass through the Selkirk Mountains in British Columbia on March 4, 1910.  It is Canada's worst avalanche disaster.

Supporting paragraphs: Rogers Pass (Montana) Montana Highway 200
Answer: Heron