With a name like Heart Attack Canyon, how can you resist? Heart Attack Canyon goes up and down the same escarpment as Road Canyon Trail, adjacent to Sunspot.
Later in the evening, NMSU's Apache Point Observatory has an open house (6 pm to midnight—come whenever if you can't make the hike). Like the Very Large Array (VLA) open house, this is one of the few opportunities you get to see the observatory's telescopes and lasers.
Since I'm planning this around the open house, this has to be on a Friday—sorry for everyone who cannot get off early!
Planned route: TBA. Will probably consist of hiking down and up the trail, and a short distance along the Rim Trail. Going to plan for 8–10 mi.
Meet: TBA. Would like to start hiking 2/2:30 pm, and hike till sunset.
More information: Forest Service info about about Heart Attack Canyon; Map of trails in area (OpenStreetMap).