The Pat-kai (Pron:pʌtˌkaɪ) or Patkai Bum (Burmese: Patkaing Taungdan)[2] are a series of mountains on the Indo-Myanmar border falling in the northeastern Indian states of Arunachal Pradesh, Nagaland and Upper Burma region of Myanmar.

The Patkai range mountains are not as rugged as the Himalayas and the peaks are much lower.

Features of the range include conical peaks, steep slopes and deep valleys.

Mawsynram and Cherrapunji, on the windward side of these mountains are the world's wettest places, having the highest annual rainfall.

In World War 2, the Patkai Range was considered a part of The Hump by the Allied Forces.