Though a small group, past and present members count among them dozens of major awards (Hugos, Nebulas, World Fantasy Awards, Stokers, etc.) and dozens more finalist nominations.
Membership is by invitation only and with a waiting list, but you're welcome to apply if you're a professional or near-professional author (e.g., getting personal rejections from professional markets) and are within driving distance of the Denver metro area. Contact the NCWW Grand PoohBah at ncww_poohbah @ ncww.org/public for information.
If you're otherwise looking for a workshop, check out Critters, an
Internet-based writers' workshop with thousands of members worldwide, or the
CritFinder, a resource to find or announce a local workshop (both sites
founded & run by the NCWW's Andrew Burt).