The Ala-Archa (Kyrgyz: Ала-Арча, also Аларча) is a river flowing through Alamüdün District of Chüy Region of Kyrgyzstan. It rises on the northern slopes of Kyrgyz Ala-Too and flows north to enter the river Chu in Chüy Valley. The Ala-Archa is 78 kilometres (48 mi) long and has a basin area of 270 square kilometres (100 sq mi).^[1] Its water comes mostly from glaciers and snow.^[2]

The river runs through Ala Archa National Park and through Bishkek. Other settlements in the river basin are Kashka-Suu, Baytik, Orto-Say, Tash-Döbö and Mayevka.