Glenwood Canyon Trail at Grizzly Creek

The Grizzly Creek rest area is one of the three full-service stops that the Colorado Department of Transportation (CDOT) built into Glenwood Canyon. It sits on the south side of Interstate 70 at mile point 121.02 and can be reached from both directions of the highway. From the car park, a short walk puts you on the paved Glenwood Canyon Recreation Path, which runs between I-70 and the Colorado River. At this point the river is all that separates the path from the railway. On OpenStreetMap, the Union Pacific main line and the passing track known as Grizzly Siding follow the south bank roughly 90 m (about 300 ft) from the path, on the far side of the water.

There are no platforms, crossings or railroad structures on the public side. You watch from the path, the rest-area lawns or the riverbank beside the Grizzly Creek boat launch, and the trains roll by on the opposite shore. That layout is what makes this spot safe and easy: you never need to go near the track, and the river forms a natural barrier.

Because freight is not scheduled, a visit is mostly waiting. The one fixed event is Amtrak's California Zephyr, which runs once a day in each direction. The site computes its passing times, so check the timetable on this page instead of guessing. Freight can arrive at any time, and with a siding right here, one train can sometimes be seen waiting while another goes by. The path is a popular bike route (Visit Glenwood rates its use as heavy), so stand to the side, and keep dogs on a leash as the path rules require.

Glenwood Canyon is a 20 km (12.5 mi) gorge cut by the Colorado River in western Colorado, with walls that reach 400 m (1,300 ft) above the water. At Grizzly Creek the canyon floor sits at about 1,875 m (6,150 ft), the elevation the U.S. Forest Service gives for the recreation path. The canyon is narrow enough that three transport corridors share it. The elevated lanes of Interstate 70 run above and behind you, the river runs in front, and the single-track railway with its siding runs along the far bank against the base of the cliffs.

The mix of old and new engineering is the setting's defining feature. The railway on the south bank follows the course the Denver and Rio Grande Western laid through the canyon in the late 19th century. The highway and the path you stand on came much later, and the rest area's picnic tables, lawns and interpretive displays are part of that CDOT design. Grizzly Creek flows into the Colorado right beside the rest area, and the boat launch next to it is one of the canyon's main rafting put-ins. In summer you often see rafts and freight trains in the same view.

The slopes above still carry the marks of the 2020 Grizzly Creek Fire, which burned 13,205 ha (32,631 acres). In 2021, rain on that burn scar sent debris flows down onto the highway and the railway. The result is a canyon that feels both carefully built and wild, where the river, the rock and the weather set the rules.

The railway came first. The Denver and Rio Grande Western Railroad built through Glenwood Canyon in the late 19th century, and the canyon line became part of the Rio Grande's main route west. Later mergers brought it into the Union Pacific system. Today it is part of UP's Central Corridor between Denver and Grand Junction, and Union Pacific owns the Glenwood Springs depot, built by the D&RGW in 1904 from brick and local red sandstone.

Amtrak's California Zephyr has served Glenwood Springs since April 24, 1983, and its route through Glenwood Canyon is one of the best-known passages on the American rail network. Other Amtrak trains also used the station until 1997: the Pioneer, which ran from 1977, and the Desert Wind, which ran from 1979.

The canyon has also been a test of how far engineering can go against nature. Interstate 70 was threaded through the same narrow gorge. The rest areas, including Grizzly Creek, and the recreation path running the length of the canyon were built as part of that highway corridor. The Grizzly Creek Fire, reported on August 10, 2020 in the I-70 median near this rest area, burned 13,205 ha (32,631 acres) and was not fully contained until December 18, 2020. The rail line closed, and Amtrak turned back two trains and rerouted service through Wyoming. A year later, rain on the burn scar triggered debris flows that closed both the highway and the railway, and the canyon's transport links reopened only after crews cleared and repaired the track. The slopes around Grizzly Creek still show that recent history.

Few places in the Colorado Rockies let you watch a busy mountain main line from a paved, flat, public path with restrooms and parking a few steps away. The Glenwood Canyon Recreation Path runs 26 km (16.3 mi) one way from Glenwood Springs, and Grizzly Creek is one of the three CDOT rest areas that serve as its main access points. The rest area is on the south side of the highway, so you do not have to cross I-70 on foot to reach the river.

The river between you and the track is the key feature. It puts a natural barrier of about 90 m (300 ft) of moving water between the viewer and the railway. You get a clear, unobstructed view of the line while staying well away from it, which is rarer than it sounds in a canyon this narrow.

Grizzly Siding sits here, so this is one of the points in the canyon where trains may be held for a meet. The same bank also carries the California Zephyr, one of the best-known long-distance trains in the United States, through a gorge Amtrak names as a highlight of the route. You can also combine the visit with the canyon's other public vantage points: No Name rest area is about 3.4 km (2.1 mi) west and Bair Ranch about 11 km (7 mi) east, both on the same path.