Twin Falls' Perrine Bridge: History & Facts

On the Northern edge of Twin Falls, Idaho, stretches a remarkable 1,500-foot-long structure: the I.B. Perrine Bridge. More than 32,000 trucks, cars, and motorcycles cross it daily—but it’s more than just a majestic landmark. Steeped in history and surrounded by natural beauty, the bridge is a tribute to the visionary spirit of I.B. Perrine, the man who helped transform the Magic Valley. Today, it draws visitors not only for its dramatic views and record-setting BASE jumps, but also as a symbol of innovation, adventure, and the enduring charm of Twin Falls.

In this article, you’ll learn the inspiring history of the Perrine Bridge, facts about the structure, and what it’s known for today.

History of Perrine Bridge

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The I.B. Perrine Bridge was first built to connect Jerome and Twin Falls counties in Idaho, saving residents hours of travel time and increasing trade between the two locations. The bridge was nicknamed the “Titanic structure” when it was first constructed, due to its massive size and height. Construction of the Perrine Memorial Bridge finished in 1927, and it officially welcomed travelers on September 1st. It measured 1,400 feet long and stood 476 feet above the Snake River, becoming the third-highest bridge in the world at the time. It was a massive celebration when it first opened, attracting 4,000 people to see the bridge and throw a barbecue with 12 fat steers. It cost the Twin Falls-Jerome Intercounty Bridge Company about $662,000 to build the bridge, so they needed to find a way to offset the cost. The solution? Make the bridge a toll road, charging $.60 per car, equivalent to $9.00 today, and a nickel per passenger. Although it was a steep fee at the time, travelers only had to pay one way.

Upon its opening, the Perrine Bridge gained immediate popularity. After all, there wasn’t another way to cross the canyon other than the bridge—unless you were willing to travel hours out of the way. For a little over a decade, the bridge served as a toll road for visitors and locals alike. However, times were soon to change, and the bridge would experience a significant shift, which would cause it to rise in demand even more.

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In 1940, the state purchased the bridge for $482,000—equivalent to about 8.5 million dollars today. It was a hefty price tag, but one that state and local governments deemed well worth the investment. The state immediately ended the pay-for-passing part of the Perrine Bridge, making it more accessible and expanding its popularity. Unfortunately, with the increase in use, the bridge began to fall into disrepair. Over the decades, the structural members began corroding, cracking, or even breaking. In the final years before a major reconstruction, a weight limit had to be enforced on the bridge, eliminating most truck traffic.

In 1976, the state realized a change needed to happen to keep the beloved historical Twin Falls landmark standing. The Allied Structural Steel Company of Hammond, Indiana, reconstructed the bridge for about 10.5 million dollars and took 3 years to complete. It spanned about 1,500 feet and towered 486 feet above the Snake River, making it 100 feet longer and nearly 3 times the width of the original 2-lane bridge. The structure remains the same today from when it was rebuilt in the 1970s, helping locals and tourists travel over the river year-round.

Although it’s known today as the I.B. Perrine Bridge, or simply Perrine Bridge, the structure was initially named “Bridge 17-850.” It was officially named the I.B. Perrine Bridge in 2000, referencing I.B. Perrine, who spearheaded the early 20th-century irrigation projects in the Magic Valley, and it is often credited as the founder of Twin Falls.

The I.B. Perrine Bridge Today: What is it Known For?

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Now recognized as one of Idaho's seven wonders, the Perrine Bridge is a historical and monumental landmark connecting Jerome and Twin Falls counties. Driving across the bridge, passengers will see breathtaking views of the Snake River Canyon stretching as far as the eye can see. Visitors are also encouraged to walk along the bridge on either side to take in the majestic views of the canyon. Below the bridge, you can hike, boat, or kayak while taking in the massive structure above.

Beyond its breathtaking canyon views, the Perrine Bridge is best known today as a top destination for BASE jumping—a daring and adventurous sport. While BASE jumping is prohibited in many places across the country, the Perrine Bridge is one of the few spots in the USA where it’s legal year-round—no permit required. The first documented jump at the bridge was in 1987, when three Twin Falls residents (former U.S. Army paratroopers) static line jumped the bridge using military surplus MC1-1B parachutes. Since then, it’s been nicknamed the “Potato Bridge” by jumpers and has become a legendary BASE jumping site. Professional jumpers pack their chutes near the Visitor Center, walk to the bridge's east side, climb over the rail, and stand on a makeshift diving board to make the exhilarating jump. They often soar to the landing zone at the end of Mogensen Trail (about a 48-story drop) below the bridge. For those without extensive skydiving experience, you can book a tandem BASE jump, which involves being harnessed to a certified instructor who handles every part of the jump.

Whether you’re hiking along the Canyon Rim Trail and soaking in panoramic views of the Snake River and Perrine Bridge, or feeling the rush of adrenaline as you BASE jump from the iconic span, this awe-inspiring location is a must-see gem in Southern Idaho. With its dramatic cliffs, sweeping vistas, and legendary adventure opportunities, it’s a place that captures both the heart and the thrill-seeker's spirit.

Experience the Magic of Twin Falls, Idaho

Gazing over the Snake River from the breathtaking heights of the Perrine Bridge or watching daredevils leap into the canyon below offers a kind of magic you won’t soon forget. The bridge isn't just an architectural wonder—it’s a gateway to adventure, history, inspiration, and some of the most stunning views in the region.

But the magic doesn’t stop there. After a day of exploring, enjoy a delicious meal at local favorites like the Turf Club, where fine dining meets the best of local flavors. Or unwind with a scenic drive to nearby Shoshone Falls, stroll through charming downtown shops, or catch the golden hour at Centennial Waterfront Park.

From natural beauty to small-town charm, Twin Falls is where unforgettable experiences unfold around every corner. Come for the Perrine Bridge and stay for everything else this vibrant Southern Idaho gem has to offer.