Periodic Spring Trail

The trail typically starts from a designated trailhead near Swift Creek. While specific parking details aren't provided, it's generally accessible by car. Look for signage for the Periodic Spring Trailhead.

The trail is located within the Bridger-Teton National Forest. Generally, dogs are allowed on trails in national forests, but they must be kept on a leash at all times to protect wildlife and ensure a pleasant experience for all hikers. Always practice Leave No Trace principles and clean up after your pet.

The unique on-and-off cycle of the Periodic Spring is most pronounced and distinctive from late August through November. During this period, the water table is at its lowest, making the intermittent flow more noticeable. However, the trail offers picturesque views throughout the warmer months.

Generally, there are no permits or entrance fees required for day hiking on trails within the Bridger-Teton National Forest, including the Periodic Spring Trail. However, it's always a good idea to check the USDA Forest Service website for any current regulations or alerts before your visit.

The trail is generally considered easy to beginner-intermediate. It largely consists of dirt, gravel, and stony surfaces, following the north side of Swift Creek. There are two bridge crossings. The final section leading directly to the spring becomes steeper and involves navigating boulders, which can be slippery due due to water spray.

The Periodic Spring Trail is approximately 1 to 2 miles round trip. Given its easy to moderate difficulty, most hikers can complete the route in about 45 minutes to an hour, allowing time to enjoy the scenery and the spring itself.

The Periodic Spring, also known as Intermittent Spring, is one of the few cold-water geysers in the world and is believed to be the largest of its kind. Unlike thermal geysers, it flows and then completely stops at regular intervals, typically every 12 to 18 minutes, due to a natural siphon effect within an underground lake.

Hikers can expect picturesque views throughout the journey. The trail winds through a steep-sided canyon adorned with beautiful cliffs, towering pine trees, and trickling waterfalls. Along Swift Creek, you'll enjoy the sight of a fast-flowing stream with a series of pools and cascades, as well as opportunities for birdwatching and vibrant wildflowers in season.

Yes, the trail is generally considered easy to beginner-intermediate, making it suitable for hikers of all ages, including families. The relatively short distance and modest elevation gain make it an enjoyable outing for children, though the final section to the spring involves some boulders that might require supervision.

In early spring, hikers might encounter water overflowing onto parts of the trail, so waterproof footwear is advisable. Be aware that the final section to the spring can be slippery due to water spray. Also, there is an "upper Swift Creek trail" that is significantly more difficult; ensure you stay on the main Periodic Spring Trail if your intent is to reach the unique spring directly.

Yes, the route also passes through sections of the Periodic Spring Trail and the Swift Creek Trail #035.

Yes, the pristine, ice-cold water from the Periodic Spring is considered safe to drink. It even contributes to Afton's water supply. However, as with any natural water source, personal discretion is advised.