Iron Mountain Hot Springs is terraced along the Colorado River with 35 mineral pools and a five-sauna Sauna Summit — including a Dead Sea–salinity pool and a Blue Lagoon mimic. The bridesmaids book Premier Access (21+, full property + 13 inspired pools) for two consecutive days. Day two is a Glenwood Caverns tram ride, a Hanging Lake hike with a Forest Service permit, and dinner at the Pullman in town. Decompression: a final Sauna Summit cycle before the drive back to Denver or Aspen.
Five quick questions, then we build the full itinerary — lodging, daily schedule, dining, bars, the group-chat message — and drop you into a Trip Room you can share with the bridesmaids.