Looks like part of it is made up of the Copper Triangle. I was planning on doing that on my own soon and that's known as ride-able on your own.

How would you do the triple bypass if it's a one way route?

Hey! I’ve done the double and have ridden all of those roads in training. They are safe to ride but always keep an ear open just in case someone wants to push their luck. The route, we’ll, It’s brutal, so get ready to suffer. Two parts of it, just before Loveland pass and around Vail Pass, are on the bike path so you should keep your head up there for other riders and what not but it’s a great route. Have fun and enjoy the altitude!

I've done parts of that ride while on vacation. There's not much shoulder on Loveland Pass, and its an alternate route for trucks carrying hazardous materials which can't go through the Eisenhower Tunnel. That said, I found the traffic moderate and generally courteous.

From Keystone to the finish, it's mostly paved rec path.

If you have enough tire, lungs, and legs, there's a nice little ~4 mile (round trip), +500', gravel road diversion to Shrine Pass that you can take from the Vail Pass rest area.

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