It's tricky to pinpoint the "tallest" fold mountains in the world because the height of a mountain is often measured from its base, which can be ambiguous.

However, here are three of the highest peaks found in fold mountain ranges:

1. Mount Everest (8,848.86 m / 29,031.7 ft) - Located in the Himalayas, a fold mountain range formed by the collision of the Indian and Eurasian tectonic plates.

2. K2 (8,611 m / 28,251 ft) - Also located in the Himalayas, known for its extreme difficulty and danger.

3. Kangchenjunga (8,586 m / 28,169 ft) - Located in the Himalayas, the third highest peak in the world.

It's important to note that other high peaks, like Lhotse and Makalu, are also located in the Himalayas and are close in height to these three.