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greenBlue Rollins Pass (aka Corona Pass)

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35.7 mile 57.5 kilometer point to point


Ascent: 3,233' 985 m
Descent: -2,674' -815 m
High: 11,671' 3,557 m
Low: 8,457' 2,578 m


Avg Grade: 3% (2°)
Max Grade: 26% (14°)


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Trail shared by Alan Doak

The old railroad grade over Rollins pass from Rollinsville to Winter Park.

Alan Doak

E-Bikes Allowed

Features -none-

Needle Eye Tunnel is closed and barricaded, but a detour path over the tunnel is available.


Head up the smooth dirt East Portal road from Rollinsville. This part of the road is suitable for all cars and crowded, so many people drive this section and park at the Moffat Tunnel. Check out the Moffat tunnel, which made the original narrow gauge railroad obsolete, before heading up the switchbacks leading up to the continental divide. There is also a bore parallel to the Moffat Tunnel which pipes water from the west side of the divide to the east side, confusing the traditional definition of a continental divide as the division between 2 drainage basins.

As you near treeline, you'll encounter the lovely Yankee Doodle Lake and Jenny Lake. On the east side of Yankee Doodle lake is the Boulder Wagon Trail, which is how 4WD vehicles avoid the Needle Eye tunnel (which is closed and barricaded). But on a bike, there is a clear detour trail over the tunnel.

At the summit, there are a few ways to go, but they all merge back together again before heading down the west side of the continental divide. If you stick to the railroad grade, near the summit is the trestle bridge, which is quite a thrilling crossing. You'll also notice a large number of timbers next to the grade near the summit, which are the remnants of a near continuous snow shed.

Enjoy the pleasant downhill on the West side of the continental divide, while stopping occasionally to enjoy the view and to inspect relics of the railroad. Pop out onto Highway 40, and either cross the highway or ride the shoulder west a bit to access the Fraser River Trail which leads to either the town of Winter Park (West) or the ski resort (East) for food and drink.

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Jan 8, 2019
Scott Glancy
Too much snow on Eastern Rollins Pass Road, so I abandoned my bike and hiked a while. 21mi — 3h 39m
Nov 23, 2018
Michael Jasch
Great day for fat biking with fresh snow falling and no one around 7mi
Oct 27, 2018
Kristi Lahusen
Snow on road to Rollins Pass. 4WD only with high clearance.
Sep 29, 2018
Barry Greene
Sep 16, 2018
Adam Taylor
Made this an out-back for a real big day. — 8h 30m
Sep 9, 2018
Mike Toney
Sep 8, 2018
CJ O'Reilly
Aug 26, 2018
CJ O'Reilly

Trail Ratings

  3.4 from 18 votes


in Rollinsville


  3.4 from 18 votes
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in Rollinsville


in Colorado


353 Views Last Month
42,490 Since Jun 26, 2013
Easy/Intermediate Easy/Intermediate

Any reason not to start this ride from the East Portal lot to shorten it a bit for time? Sep 13, 2018
Suppose that you are traveling from Boulder to Winter Park on a cyclocross / gravel-grinder bike loaded with a couple of panniers, and you are getting a mix of rain, hail, and snow that limit your visibility. You have pushed this bike up the trail above the tunnel. When you see the wind shelters, bear to the right (North-East). You want to get back down to Rollins Pass Road as soon as possible. Do not be tricked into going left (West) and following Boulder Wagon Road, which is more like a long, skinny collection of 10 cm rocks than a road. Other than pushing my bike for 2.5 km along Boulder Wagon Road during a snow storm, I had a great time on this ride. I had even more fun going back to Boulder from Winter Park a few days later when the weather was clear. If you do not mind a lot of vibration and occasionally pushing with your feet, this ride is feasible on a cyclocross bike with 40 mm wide tires. If you are coming from Boulder and want to avoid riding in Boulder Canyon, I recommend taking the bus from Boulder to Nederland. Returning to Boulder, Magnolia Road is a good option. Sep 28, 2018
The Bicycling Touring Pro recently did this route from Nederland to Winter Park as part of his tour of Colorado. His YouTube videos are great: He does it with a fully loaded touring bike carrying a tent and a drone! Like me, it looks like he also used Boulder Wagon Road after hiking over the tunnel, so he missed the awesome railroad trestle bridge. 5 days ago

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