Changes to Some Opening/Closing Dates for Services and Facilities – Check Back for Updates
Some of the opening/closing dates for facilities and visitor services in the parks have changed due to weather and/or other circumstances. See link for details and match to locations on the park map (under "Park Tools," bottom left, this page). More »
Road Conditions (Entire Park) and Road Construction Delays (if Entering/Exiting Hwy. 198)
Expect 20-minute to 1-hour construction delays on main road through parks (Generals Hwy) until Memorial Day weekend (7 a.m.-6 p.m.). See link for schedule. Call for 24-hour road conditions info: 559-565-3341 (press 1, 1, 1). More »
Vehicle Length Limits Have Changed in Sequoia NP (if Entering/Exiting Hwy 198)
Planning to see the "Big Trees" in Sequoia National Park? If you enter/exit via Hwy. 198, please pay close attention to new vehicle length advisories for your safety and the safety of others. More »
You May Have Trouble Calling Us. Use the "Contact Us" Link (Bottom Left) to Send an E-mail.
We are experiencing technical problems receiving some incoming phone calls at the parks. We apologize for the inconvenience. Please keep trying to reach us or check this website for frequently-asked questions. The search box (top, right) may be helpful.
Prescribed Fires Planned at Ash Mountain/Sequoia National Park (Parks' South Entrance)
Fire crews will be working on hazard fuel reduction project at Ash Mountain (south entrance) starting May 23. There are nine small burn segments near the south entrance. The fire may be visible from the road and will produce smoke for very short periods.
Giving Mountain Yellow-legged Frogs a Fighting Chance
"Plop…plop…splash!" Have you ever heard this sound -- a frog hopping in or out of water -- or seen a frog or tadpole? Imagine not hearing this sound in a place where you did in the past? Wouldn't that be strange?
Animals need a "helping hand" once-in-a-while for survival. For example, mountain yellow-legged frogs (Rana muscosa and Rana sierrae) are amphibians that inhabit naturally fishless lakes, ponds, and streams in the high country of the Sierra Nevada mountains. Once the most numerous amphibians in the Sierra Nevada, today mountain yellow-legged frogs have disappeared from 92% of their historic range. View map of former fishless areas in Sequoia and Kings Canyon National Parks. As a result, they are candidates for listing under the federal and California Endangered Species Acts.
National Park Service
How did this happen? Extensive research identifies two main reasons for their decline. First, trout had been introduced to high-elevation lakes to draw recreationists and tourists to the area. This created an imbalance in the natural world. Trout eat tadpoles and small frogs and compete with frogs for insects. In addition, trout restrict frogs and tadpoles to small, low-quality areas and separate frog populations from one another. As a result, many mountain yellow-legged frog populations have died out. Second, a fungal disease called chytridiomycosis is threatening the existence of frog populations that had been thriving in fishless areas. The disease affects the skin of frogs and causes most infected animals to die.
As the famous conservationist John Muir once said, "When we try to pick out anything by itself, we find it hitched to everything else in the Universe." Frogs are a very important link in the food chain, or the order that animals feed on other plants and animals. For example, the sun provides food for grass. The grass is eaten by a grasshopper. The grasshopper is eaten by a frog. The frog is eaten by a snake, and the snake is eaten by a hawk. Removing the frog from the food chain, if eaten by trout, limits the food for other animals and disrupts the natural cycle.
National Park Service
Studies in the parks show that introduced trout harm entire ecosystems, not just mountain yellow-legged frogs. Trout are effective hunters who eat other amphibians, aquatic insects and zooplankton (small animals that naturally drift in water) leaving less food available for other wildlife.
Due to the long-term impacts from introduced trout, a helping hand intervened with an impressive recovery for mountain yellow-legged frogs as the result. In 2001, park staff began using large nets and electrofishers (a device that temporarily stuns fish) to physically remove trout from selected waters. The goal was to restore the balance of nature to the pre-trout environment, with a focus on improving the health of mountain yellow-legged frogs. By 2011, nearly 44,000 fish were removed from 19 lakes, including complete removal from nine lakes.
National Park Service
In one restoration area, in remote lakes and streams of Upper LeConte Canyon, frog surveys conducted by park staff each summer season recorded the stunning progress. View LeConte restoration area map. From 2001, when fish removal began, to 2004, after most of the fish had been removed, the number of mountain yellow-legged frogs/tadpoles in three restoration lakes increased from nearly 190 to over 18,800 - a 10,000% increase! From 2005 to 2011, during the removal of the remaining few fish, the population of frogs/tadpoles in these lakes stabilized, with numbers ranging from a 1,900-6,000% increase. View mountain yellow-legged frog response graph. In addition, over 2,000 frogs moved into two nearby lakes. As a result, the frog population increased to the point where it is now in a much stronger position to deal with other threats, such as disease.
Due to these efforts, the natural balance has been restored for this population of mountain yellow-legged frogs. Hardy hikers in Upper LeConte Canyon may see many frogs or hear frequent "plops" or splashes near lakes and streams in summer. Other visitors may observe frogs laying eggs, see thousands of tadpoles as the waters warm, or learn about the project through park staff near the restoration areas. In addition, although introduced trout are being removed from selected waters to improve conditions for the parks' wildlife, trout will remain in hundreds of lakes and ponds in the parks, and ample opportunities will continue to be available for recreational fishing.
If you have been inspired by this story of the mountain yellow-legged frogs, you may be interested in the development of a related plan and draft environmental impact statement that would potentially restore additional sites in the parks. For more information, be sure to visit www.nps.gov/seki/parkmgmt/rheae.htm. The project is entitled "Restoration of Native Species in High-Elevation Aquatic Ecosystems." To add your name to the project mailing list, please send an e-mail to email@example.com.
Did You Know?
Sequoia and Kings Canyon National Parks offer more than 850 miles of maintained wilderness trails. Over 723,000 of the parks' acres are officially designated as Wilderness. More...