I happen to work there, so my position might be biased.
Bicycle Colorado is an incredible organization that has done tons of advocacy/education work over the past 17 years here in Colorado. We have been heavily involved in bicycle related legislation (we employ a part time lobbyist), including pushing through the most recent Bicycle Safety Bill into law but also we are weighing in on things such as Cell Phone/Texting legislation and poised with our 7,000 individual members to make a stink or applaud depending on the nature of a bill. Another recent success was the result of a seven year effort to get CDOT to include a complete streets policy which they have now begun to work on implementation.This year we worked in collaboration with Bike Denver to rewrite the bicycle section of the Colorado Driver's Manual, it was completely retooled to reflect what to look for when encountering bicyclists, the most common crashes vehicles have with bicycles and why, as well as shine a more positive light on cyclists in general. We have a presence at events across the state and do our best to ensure that they happen safely and that every cyclist is better educated on how to operate their bicycle after finishing. We also have a trail building program that is ongoing which builds sustainable MTB trails (such as The Free Lunch Trail).
I run our Education Department so we spend the majority of our year either writing grants for, or executing, Safe Routes to School programming across the state. We work with schools to get more students, parents, and staff walking and biking to school by teaching bicycle safety in PE classrooms, collaborating with the administration to run encouragement programs to get the students out and trying it, and with local law enforcement to help us raise awareness about students around schools. At the end of this school year we will have taught 25,000 students bicycle safety in a small classroom environment. In our "off season" we work with companies here through our Bicycle Commuter Services program essentially trying to get companies to do exactly what we are able to get schools to do through Education, Encouragement, Design, etc...
This is the tip of the iceberg, I promise.
Frankly, at the end of each year when we take a look at everything that has been accomplished and everything that still needs to be done and it is shocking to acknowledge that such a small staff has been such an integral part of "building a bicycle friendly colorado" but also humbling to know that there is so much more to be done.
In short, yes, I think it is a worthy cause.