Georgia Pass and Boreas Pass can both be interesting for a different reasons. Georgia Pass is a nice…but challenging…mountain bike ride. The south side is relatively smooth all the way to the top but it gets rough and rocky on the north side. Thirty years ago it was very rural ride, even on the Breck side. Today, you drop down into the middle of a housing development on Tiger Run Road.

Boreas Pass is a historic narrow gauge railroad bed. It’s part of the line that went to the Alpine Tunnel. It’s a relatively gentle grade and a fun ride from one side to the other or just from one side to the top. However, I wouldn’t go that far out of my way just to ride it.

Your route isn’t too far off of what I would do. I’d just make the changes I’ve suggested for simplicity. This route cuts across South Park without going on 285. You might have to divert a bit for camping in South Park as most of the valley is private land.

I would probably opt for the route to the north of Cheesman Reservoir (Sedalia 1). I just don’t go down onto the Rampart Range because it can be a motörhead nightmare on the weekend. It’s very popular with the OHV crowd. If you can avoid starting on a Saturday, you’ll probably have a much more pleasant ride on that route.

You wouldn’t start at Sargents. If you go over the Alpine Tunnel route, you’ll end up just above Pitkin. You can continue down hill to Parlin. From there you have about 10 miles of pavement on US50 with an option for some dirt roads just to the north of the highway. This route avoids going over Cumberland. Here’s that route.