[2] The Ulhas splits at the northeast corner of Salsette island into its two main distributaries, the other one being the Vasai Creek, both of which empty into the Arabian Sea.

It gets its name from the city of Thane, previously Thana, located on eastern banks of the creek.

The region of the Thane Creek has been recognized as an Important Bird Area by the Bombay Natural History Society, as it is home to various avian species.

[4] In 2022, the teams of Bombay Natural History Society (BNHS) counted more than 130,000 flamingoes in Thane creek.

[5] Alongside the flamingoes, 167 species of birds and small mammals like golden jackals are also present.

The first railway bridges in the country, they were built over the Thane creek when the Mumbai-Thane line was extended to Kalyan in May 1854.

A report from Bombay Times elaborately describing the route for an account of a first trial journey of 18 November 1852 between Bombay and Tannah (before the official opening on 16 April 1853) also gave details on the Tannah-Callian (today, Kalyan) section, then under construction.

It said that the railway [route] bent quickly towards 'the viaduct' on entering the village.