Thunder River is a magical spot on the North Rim of the Grand Canyon where the world's shortest and steepest river bursts from a cave in the side of the canyon and crashes down 1,200 feet in less than 1/2 a mile to meet Tapeats Creek on its way to the Colorado River. Practically the entire length of the river consists of waterfalls, which nourish a tropical forest of remarkeable beauty.
Few people ever see Thunder River because the drive to the trailhead is so remote, and the hike is a minimum of 20 miles roundtrip, more if you see other spectacular sights in the area. You should take a minimum of 4 days to do this hike, preferably more.
There are two trailheads for Thunder River, the Thunder River trailhead, and the Bill Hall trailhead. Less experienced packers should use the Thunder River trailhead, as it is less steep. Starting from Thunder River trailhead, it is 15 miles to Thunder Cave where the river emerges. Starting from Bill Hall it is only 10 miles to Thunder Cave, however the trail is much steeper and more challenging.
From Thunder Cave, it is another 3 miles to the Colorado River in the Grand Canyon. You will descend 3,400 feet, and then climb those feet again on your way out. NOT a walk in the park.
I highly recommend making this a full-week trip and combining the Deer Creek trail, as well, which leads you to lovely waterfalls and deep narrow canyons filled with lovely swimming holes. Doing a circuit would make the roundtrip mileage near 50. This magnificent trek requires route-finding skills, strong hikers, and plenty of advance planning.
The hiking season at Thunder River is VERY short, due to heavy snowfall in winter and extreme temperatures in summer. May, June, September, and October are the only realistic months in which to hike. May might not be feasible, either, if the snow melts late, creating impassable muddy roads and miserable trails.
Hiking Thunder River requires a permit from the National Park Service. You can download and print the permit request form at this link:
click here
Rangers carefully scrutinize applicants to make sure you are experienced enough to do this hike.
If you feel like you are out of your league but still want to see these amazing sights, you may hire a guide company to take you. A list of Park Service-approved guides can be found at:
click here
I always recommend Canyon Dreams. Do not expect guided hikes to be cheap! They take care of everything for you, even the permit applications.
Thunder River is a rarely seen part of our country's most famous National Park, and the few that endure the harships to see it are forever glad they did. 80% of people who venture into Thunder River country return!
Will you be one of them?