It's hard to believe autumn is right around the corner when East Tennessee is still dealing with a heat wave and high temperatures. But those who wish to visit Great Smoky Mountains National Park to see the coveted fall foliage might want to start planning, since peak leaf-gazing season is also the park's busiest time of year.
The smokymountains.com interactive 2026 Fall Foliage Map predicts peak fall colors will hit their apex in mid-October, but most of October is classified as Red Diamond Days by the National Park Service, marking those days as the busiest of the year with anticipated full parking lots and roads heavily congested with traffic.
What is a Red Diamond Day?
The NPS sorts days of the year in Great Smoky Mountains National Park into three categories: Green
Circle Days, Yellow Triangle Days and Red Diamond Days. Green Circle Days are the park's least busy days, moderate congestions is seen on Yellow Triangle Days and overcrowding is expected on Red Diamond Days.
The classification is based on historical park visitation data.
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Completely full parking lots and heavy traffic jams are expected on Red Diamond Days. The NPS recommends always having a backup plan. Even on busy days, you can find trails in the park that aren't as crowded as others.
When are Red Diamond Days?
Red Diamond Days occur sporadically throughout the year. But in October, during peak leaf season, crowded days are pretty consistent.
The 17-day stretch from Oct. 10 through Oct. 26 is made up entirely of Red Diamond Days. Additionally, Oct. 4, 5 and 29 also are categorized as Red Diamond Days. More than half the month, 20 days out of 31, are expected to see heavy traffic, based on park historic park data.
How to avoid crowds in Great Smoky Mountains National Park
In addition to having a backup plan for where you want to go in the park, the NPS recommends using a shuttle service as one way to avoid crowds on busy days. Using shuttles helps to ease congestion on the roads and parking lots.
Shuttles authorized by Great Smoky Mountains National Park include:
- AAA Hiker Shuttle
- A Walk in the Woods
- Bryson City Outdoors
- Carolina Bound Adventures
- Great Smoky Mountains Eco Tours
- LeConte Lodge Trailhead Shuttle
- Rocky Top Tours
- Shaconage Shuttle Service
- Smoky Bear Shuttle
- Smoky Rides
Parking lot spots are limited. Even if you purchase a parking tag, there is no guarantee a spot will be available when you arrive, which is one reason the NPS suggests using a shuttle service.
Cell service in the park also is limited. The NPS recommends having your shuttle booked prior to arriving. Park rangers cannot book shuttles for visitors.
Afton Pratt covers trending news for The Knoxville News Sentinel and Tennessee. She can be reached at ampratt@usatodayco.com.
This article originally appeared on Knoxville News Sentinel: Peak fall color in Great Smoky Mountains overlaps with busiest days
