Earlier this spring I wrote about Garmin's bike mount for the Colorado handheld. I wasn't too pleased with the zip tie mounting system, though once I moved it to the handlebar stem it was much more stable. But a stem mount means the angle isn't adjustable, and visibility was quite poor.
Fortunately, a RAM mount has finally been released for the Colorado, and I couldn't wait to try it out. What I ended up with is pictured above. But don't go ordering one till you read the rest of the story.
The closest thing RAM offers to a packaged Colorado bike mount is the monstrosity pictured at left. You sure don't want to flip your bike with that on it!
But it appeared to me that the RAM Colorado cradle would work with the same rail mount I had used for other handlebar mounts. Those last two links are for the components you will need to replicate my mount. ( EDIT: That last link doesn't work; not sure why. The part you want is RAP-274 or RAP-274U. Either will work.) Please note that the rail mount is designed for 1.0 to 1.1" diameter handlebars and will not work with 31.8 mm handlebars.
The rail mount is actually two pieces, shown on the right below. These two pieces are bolted to each other first, allowing you to cock the mount and GPS right or left. I always leave mine straight.
Sharp-eyed observers may notice that the diamond on the rail mount and the diamond on the Colorado cradle are not the exact same width. No need to worry; the bolt holes line up perfectly.
As I expected, the RAM mount performed admirably for me on the trail, which included bruising singletrack with lots of drop offs.
Pictured below are more shots of the end result, which can be adjusted to give you the best viewing angle possible.