Geography
Area: 143,100 sq. km.
Capital: Dushanbe.
Terrain: Pamir and Alay mountains dominate landscape; western Ferghana valley in north, Kofarnihon and Vakhsh Valleys in southwest.
Climate: Mid-latitude continental, hot summers, mild winters; semiarid to polar in Pamir mountains.

Geography of Tajikistan
At 36'40' northern latitude and 41'14' eastern longitude, Tajikistan is nestled between Kyrgyzstan and Uzbekistan to the north and west, China to the east, and Afghanistan to the south. Tajikistan is home to some of the highest mountains in the world, including the Pamir and Alay ranges. Ninety-three percent of Tajikistan is mountainous with altitudes ranging from 1,000 feet to 27,000 feet, with nearly 50% of Tajikistan's territory above 10,000 feet. Earthquakes are of varying degrees and are frequent. The massive mountain ranges are cut by hundreds of canyons and gorges at the bottom of which run streams which flow into larger river valleys where the majority of the country's population lives and works. The principal rivers of Central Asia, the Amu Darya and the Syr Darya, both flow through Tajikistan, fed by melting snow from mountains of Tajikistan and Kyrgyzstan. Flooding and landslides sometimes occur during the annual Spring thaw.
source: http://www.state.gov