Fireflies in Great Smoky Mountains National Park/NPS

Mark your calendars for one of the most famous light displays at Great Smoky Mountains National Park. That's right, the synchronous blinking of the park's fireflies.

Park staff say they'll provide shuttle service to the viewing areas in Elkmont this coming June 7-14. All visitors wishing to view the synchronous fireflies at Elkmont must have a parking pass distributed through the lottery system at www.recreation.gov.

Every year in late May or early June, thousands of visitors gather near the popular Elkmont Campground to observe the naturally occurring phenomenon of Photinus carolinus, a firefly species that flashes synchronously. Since 2006, access to the Elkmont area has been limited to shuttle service beginning at Sugarlands Visitor Center during the eight days of predicted peak activity in order to reduce traffic congestion and provide a safe viewing experience for visitors that minimizes disturbance to these unique fireflies during the critical two-week mating period.

The lottery will be open for applications from Friday, April 27 at noon Eastern until Monday, April 30, at 8 p.m. Eastern. Results of the lottery will be available on Wednesday, May 9. A total of 1,800 vehicle passes will be available for the event which includes: 1,768 regular-parking passes (221 per day) which admit one passenger vehicle up to 19 feet in length with a maximum of six occupants, and 32 large-vehicle parking passes (four per day) that admit one large vehicle (RV, mini-bus, etc.) from 19 feet to 30 feet in length, with a maximum of 24 occupants. Lottery applicants must apply for either a regular-parking pass or large-vehicle parking pass and then may choose two possible dates to attend the event over the eight-day viewing period.

The lottery system uses a randomized computer drawing to select applications. There is no fee to enter the lottery this year. If selected, the lottery winner will be charged a $20 reservation fee and awarded a parking pass. The parking pass permits visitors to park at Sugarlands Visitor Center and allows occupants to access the shuttle service to Elkmont.

Parking passes are non-refundable, non-transferable, and good only for the date issued. There is a limit of one lottery application per household per season. All lottery applicants will be notified by e-mail on May 9 that they were “successful” and awarded a parking pass or “unsuccessful” and not able to secure a parking pass.

The number of passes issued each day is based primarily on the Sugarlands Visitor Center parking lot capacity and the ability to accommodate a large number of viewers on site. Arrival times will be assigned in order to relieve traffic congestion in the parking lot and also for boarding the shuttles, which are provided in partnership with the City of Gatlinburg. The shuttle buses will begin picking up visitors from the Sugarlands Visitor Center parking area at 7 p.m. A $2 round-trip, per-person fee will be collected when boarding the shuttle. Cash is the only form of payment accepted.

The shuttle service is the only transportation mode for visitor access during this period, except for registered campers staying at the Elkmont Campground. Visitors are not allowed to walk the Elkmont entrance road due to safety concerns.

Visitors may visit the website www.recreation.gov and search for “Firefly Event” for more information and to enter the lottery. Parking passes may also be obtained by calling 1-877-444-6777, but park officials encourage the use of the online process. The $20 reservation fee covers the cost of awarding the passes, viewing supplies, and nightly personnel costs for managing the viewing opportunity at Sugarlands Visitor Center and Elkmont.

For more information about the synchronous fireflies, please visit the park website at .