Question: What stretched more than 300 miles and includes Bull Lake Glacier?

Context paragraphs:
Bull Lake (Frontenac County): Bull Lake is a lake on the Salmon River system in Central Frontenac, Frontenac County, Ontario, Canada.  It is 3.7 km long and .5 km wide and lies at an elevation of 186 m about 2.5 km east of the community of Elm Tree.  The primary inflow is a channel from Buck Lake, and primary outflow is a channel to Horseshoe Lake.  The Bull Lake does not have very much residents and did not have a residential park around it until 2003

Little Bull Lake (Sudbury District): Little Bull Lake is a lake in Sudbury District, Ontario, Canada.  It is about 940 m long and 330 m wide, and lies at an elevation of 326 m about 46 km northeast of the community of Capreol and 62 km west of the community of Temagami.  The primary outflow is an unnamed creek to Bull Lake.  Little Bull Lake is part of the drainage basin of the Yorston River, which flows into the Sturgeon River.

Lower Fremont Glacier: Lower Fremont Glacier is east of the Continental Divide in the northern Wind River Range in the U.S. state of Wyoming.  The glacier is in the Fitzpatrick Wilderness of Shoshone National Forest, and is among the largest grouping of glaciers in the American Rocky Mountains.  Lower Fremont Glacier flows to the southeast and the rapid retreat of this glacier has left behind lateral moraines and a proglacial lake.  Lower Fremont Glacier is separated from the Bull Lake Glacier by a moraine and from the Upper Fremont Glacier by cliffs.

Green Lake Glacier: Green Lake Glacier is in North Cascades National Park in the U.S. state of Washington and is immediately northeast of Bacon Peak.  Green Lake Glacier descends from a ridge extending from the east of Bacon Peak.  The glacier forms two tongues descending to the north of the ridge from 6600 to .  The ridge is an arête which separates Green Lake Glacier from Diobsud Creek Glacier to the south.  Meltwater from the glacier spills over Bacon Lake Falls en route to Green Lake.

Bull Lake (Yorston River): Bull Lake is a lake in Sudbury District, Ontario, Canada.  It is about 2300 m long and 860 m wide, and lies at an elevation of 324 m about 46 km northeast of the community of Capreol and 62 km west of the community of Temagami.  The primary outflow is an unnamed creek to an unnamed lake on the Yorston River, a tributary of the Sturgeon River, between Long Lake upstream and Seagram Lake downstream.  Little Bull Lake is immediately upstream of Bull Lake, and is connected by a short unnamed stream.

Rocky Mountains: The Rocky Mountains, commonly known as the Rockies, are a major mountain range in western North America.  The Rocky Mountains stretch more than 3000 mi from the northernmost part of British Columbia, in western Canada, to New Mexico, in the Southwestern United States.  Within the North American Cordillera, the Rockies are somewhat distinct from the Pacific Coast Ranges and the Cascade Range and Sierra Nevada, which all lie further to the west.

Jackson Peak (Fremont County, Wyoming): Jackson Peak is the eighth-highest peak in the U.S. state of Wyoming and the seventh-highest in the Wind River Range.  The Bull Lake Glacier is located immediately north and east of the mountain.  Situated on the Continental Divide, Jackson Peak is .75 mi southeast of Fremont Peak.

Milk Lake Glacier: Milk Lake Glacier is located in the Glacier Peak Wilderness in the U.S. state of Washington.  The glacier is within Mount Baker-Snoqualmie National Forest and a little over 3 mi northwest of Glacier Peak.  Milk Lake Glacier disappeared sometime between 1984 and 1997 and by 2005, Milk Lake was situated where the glacier had once been.

Montana Highway 56: Highway 56 in the U.S. State of Montana is a route running in a northerly direction from an intersection with Montana Highway 200 between Noxon and Heron at an area locally known as "Bull River Junction", about 10 mi east of the Idaho state line.  The highway extends approximately 35 mi to a northern terminus at an intersection with U.S. Route 2, about 3 mi east of the town of Troy.  The highway passes through a forested, mountainous landscape, and travels along the eastern shore of Bull Lake; the Cabinet Mountains are to the east.  The entire route is within the boundary of the Kootenai National Forest.  Highway 56 is known locally as the "Bull Lake Road" and "Bull River Highway."

Bull Lake Glacier: Bull Lake Glacier is located immediately east of the Continental Divide in the northern Wind River Range in the U.S. state of Wyoming.  The glacier is in the Fitzpatrick Wilderness of Shoshone National Forest, and is among the largest grouping of glaciers in the American Rocky Mountains.  Bull Lake Glacier flows to the east and starts below the summit of Jackson Peak.  It is adjacent to Lower Fremont Glacier though the two are separated by a moraine.

Supporting paragraphs: Bull Lake Glacier Rocky Mountains
Answer: The Rocky Mountains