This should be two different roads. 119 from Boulder to Nederland is a good road, if you can find any room without sitting behind someone. Magnolia road splits off from 119 and is a very steep mountain road that turns to dirt a few miles in. Lots of dirt roads leading to it leaving tons of crap on the road and lots of steep blind corners id suggest to avoid it. Left canyon Rd. and 72 are much more enjoyable to ride.