Synchronous firefly lottery

Great Smoky Mountains National Park will open its 2026 lottery for the Elkmont firefly viewing event at 10 a.m. Eastern on April 24. The application window closes at 11:59 p.m. on April 27. (nps.gov) The park set the 2026 viewing dates for May 20 through May 27 at Elkmont, where winners get a one-night vehicle reservation to enter the restricted viewing area. Applications go through Recreation.gov and cost $1 to enter the lottery. (nps.gov, recreation.gov) Synchronous fireflies are Photinus carolinus, a species whose males flash in near-unison during a short mating display in late May or early June. Great Smoky Mountains National Park says the species is one of only a few in the world known for that synchronized pattern. (nps.gov, recreation.gov) Elkmont draws heavy crowds for the display, so the park limits access to reduce traffic and protect the insects during their breeding season. During viewing nights, access after noon is restricted to passenger vehicles with reservations, registered Elkmont Campground campers, or backcountry campers with valid permits. (nps.gov, wbir.com) The lottery does not guarantee a peak-night show, because the exact timing depends on weather, soil moisture, and temperature. The park said it chose the May 20-27 window based on observations from previous years and will not adjust dates once reservations are issued. (nps.gov, knoxnews.com) Applicants who are selected must pay a $29 vehicle reservation fee in addition to the $1 application fee. The National Park Service said lottery participants will be notified by May 13 whether they were selected. (nps.gov, recreation.gov) The park has used a lottery system for years because the event has become one of its most sought-after seasonal draws. In 2025, the viewing window ran May 29 through June 5, showing how the dates shift from year to year with conditions on the ground. (nps.gov, nps.gov) For visitors who do not win, the park’s rules still shape late-spring travel in Elkmont, because roads and parking tighten during the event week. For the winners, the next date that matters is May 13, when the park says selection notices will go out. (nps.gov, recreation.gov)