Alagalla Mountain Range

Alagalla (අලගල්ල, literal translation: Tuber rock) Mountain Range is situated at the boundaries of the Central and Sabaragamuwa Provinces in Sri Lanka. Along with the surrounding (බතලේගල) also known as Bible Rock,  (උතුවන්කන්ද),  (දෙවනගල),  (අම්බුළුවාව), Knuckles Mountain Range and Hanthana (හන්තාන) Mountain Range, Alagalla mountain has served as a natural defense location for nearly five centuries (1505–1948) against the Portuguese, Dutch and English invasions aimed at the Kandyan Kingdom.

Historical importance
Most of the battles to invade the Kandyan Kingdom took place at Balana (literal translation viewing point), with the Kandyan monarchs emerging victorious aided by the impenetrable mountain formations. The famous Balana Fort which functioned as a strategic rock fortress and an outpost to Kandyan kingdom was built between Kadugannawa Pass and Alagalla Mountain Range.

Meangalla Pass and Meeyangala tunnel
The railway lines to upcountry were established by the English once the Kandyan Kingdom was absorbed into the British Empire in 1815. However, extending the already working Colombo-Ambepussa (අඹේපුස්ස) mainline across the  mountain to Kandy proved to be extremely challenging as it had to be navigated around a waterfall,  (මීයන් ඇල්ල) about 100 ft high falling directly on the planned route and across a steeply inclined solid rock of more than 1000 ft thick.

Initially, the railway track was constructed by gouging artificial grooves on the rock at the top of the waterfall to "split" the waterfall into two and fall away from the rail route. The tracks were then set up around the inclined rock and this was called the (මීන්ගල්ල) pass. However, this railway route was found to be dangerous, especially in the rainy season as heavy rains caused the swollen waterfall and slip rocks to damage the trains and the rail tracks.

This resulted in a more robust and safe rerouting via drilling through the solid rock. The (මීයන්ගල්ල) tunnel, thus constructed and numbered as tunnel 5A, became the sixth tunnel in the Colombo-Kandy railway line and also the second-longest railway tunnel in Sri Lanka at 423 m long.

Hiking through the Alagalla Mountains
Alagalla mountains can be reached by taking either the Colombo-Kandy line to railway station, or by taking the Kandy- bus from  to  junction.

If following the route, trekking can be started at  railway station through the  village. The 6 m (දෙකිඳ ඇල්ල) waterfall, served by the Alagalla forest reserve, can also be viewed slightly off-route. Alternatively, a slightly longer trekking path via can be reached by taking the Kandy- bus route to  junction from. In both routes, the support of a local guide is strongly encouraged.

The summit of the Alagalla mountain Range is a platform to witness the view of the other surrounding mountains, including (බතලේගල) also known as Bible Rock,  (දෙවනගල),  (අම්බුළුවාව), Knuckles Mountain Range and Hanthana (හන්තාන) Mountain Range.