The Vallecito rescue incident convinced us to put out a reminder to get a Colo Search and Rescue card. They're $3.00/year or $12.00 for 5 years.
This is a must for the river, plus the mountain bikers, backcountry skiers, fly-fisherman, and for hiking/camping.
It wouldn't take much in the wilderness to create a hairy situation, and a rescue without the card is really expensive.
Here's the link - get one!