For instance, you can go down to Las Animas on May 17 and be "Bent on Birding." (Note to British readers: "bent" in this case does not mean that they cheat on their life lists. Nor is it a reference to sexual preference.)
Around Mancos and the Ute Mountain Reservations, an elaborate program is planned, starting tomorrow.
Other trips are planned to remote ranches for viewing hepatic tanagers and other migrants. Because of the distances involved (for humans), food and lodging are provided. Here's a typical listing, courtesy of the Colorado Division of Wildlife's events and festivals page:
Field Trip to Kim Area Ranches for Hepatic Tanagers, May 31-June 1. Limited to 12 participants. $90 per person includes one night lodging and dinner. This trip will visit area private ranches to search for nesting Hepatic Tanagers and other breeding species near the New Mexico and Oklahoma borders. Contact: Nathan Pieplow at email@example.com.
For general Colorado birding information, visit the Colorado Birding Trail site, which also has a calendar page.