Cupid’s Undie Run Registration open. Warm weather is bad for skiing but potentially good for the barely clothed runners of Cupid’s Undie Run. The annual event, which invites participants to don their best underwear outdoors, doesn’t arrive until Feb. 28, but you can (and should, given its popu larity) sign up now for “the nation’s largest pantless party,” as organizers wrote. The event raises awareness of neurofibromatosis, a genetic disorder that causes tumors to grow on nerves throughout the body and fundraises for NF research through the Children’s Tumor Foundation, they added. The run “kicks off with drinking and dancing, then we jog it out with a mile(ish) run and end it all with an epic dance party!” The 21-and-up run starts at Stoney’s Bar and Grill, 1111 Lincoln St. in Denver. Registration is $45 per person. Visit bit.ly/4bLcS8V for more. — John Wenzel ...read more read less