Question: I-90 crosses the Continental Divide over what Pass in the Rocky Mountains of Montana?

Interstate 90 (I-90) is a transcontinental freeway, and the longest Interstate Highway in the United States at 3,020.54 mi .  Its western terminus is in Seattle, at State Route 519 near Safeco Field and CenturyLink Field, and its eastern terminus is in Boston, at Route 1A near Logan International Airport.  East of the Wisconsin-Illinois border, much of I-90 follows several toll roads, many of which predate the Interstate Highway system.  The Jane Addams Memorial Tollway, Chicago Skyway, Indiana Toll Road, Ohio Turnpike, New York State Thruway, Massachusetts Turnpike, and the Ted Williams Tunnel are all toll roads used by I-90 in the eastern half of the country.  I-90 crosses the Continental Divide over Homestake Pass just east of Butte, Montana.  The Interstate is not tolled through some segments in downtown Chicago; Greater Cleveland, and the rest of Northeast Ohio; Pennsylvania; and through brief sections near Buffalo and Albany.  Erie, Pennsylvania; Madison, Wisconsin; Billings, Montana; and Spokane, Washington are other major cities on I-90. <SEP> The Continental Divide National Scenic Trail (in short Continental Divide Trail (CDT)) is a United States National Scenic Trail running 3,100 miles between Mexico and Canada.  It follows the Continental Divide of the Americas along the Rocky Mountains and traverses five U.S. states — Montana, Idaho, Wyoming, Colorado, and New Mexico.  In Montana it crosses Triple Divide Pass (near Triple Divide Peak which separates the Hudson Bay, Atlantic Ocean and Pacific Ocean drainages.) The trail is a combination of dedicated trails and small roads and considered 70% complete.  Portions designated as uncompleted must be traveled by roadwalking on dirt or paved roads.  This trail can be continued north into Canada to Kakwa Lake north of Jasper National Park by the Great Divide Trail, which is so far described only in a few books and carries no official Canadian status. <SEP> Lewis and Clark Pass, el.  6424 ft is a mountain pass on the continental divide in Montana.  It lies at the head of the drainages of the west flowing Blackfoot River and the east flowing Dearborn River.  The pass is in the Helena National Forest in Lewis and Clark County.  The Continental Divide Trail traverses north and south through the pass.  At the time of the Lewis and Clark Expedition the pass was a much-used pathway where the native people living in what today is Montana crossed over the continental divide.  The pass was crossed by Meriwether Lewis on July 7, 1806, on the return leg of the Lewis and Clark Expedition with a party of nine men and his dog Seaman.  The pass was named for the expedition's two leaders–Lewis and William Clark.  Lewis and Clark Pass is the only roadless pass on the entire Lewis and Clark National Historic Trail.  It has gone from being one of the most used continental divide passes prior to the pioneer era to one of the least visited passes today.  It can be accessed by a 1.5 mi trail.  Visitors will encounter the pass much as Lewis did in 1806.  The furrows left by the countless dog and horse travois that crossed the pass are still visible (though fading) and this is one of the places along the expedition's route that visitors may still encounter a grizzly bear.  On a clear day, like Meriwether Lewis in 1806 one can see Square Butte in Cascade County, Montana, 40 mi to the northeast. <SEP> Homestake Pass is a mountain pass in the Rocky Mountains of Montana in the United States.  It sits on the Continental Divide on the border between Jefferson County and Silver Bow County, six miles south-southeast of Butte in Beaverhead-Deerlodge National Forest at an elevation of 6329 ft .