Claritas Fossae is a group of troughs in the Phoenicis Lacus and Thaumasia quadrangles of Mars, located at 31.5 S and 104.1 W. The structure is 2,050.0 km long and was named after a classical albedo feature name.

[1] It was proposed that this area might be still tectonically active in relatively recent times.

[2] Long narrow depressions on Mars are called fossae.

Fossae/pit craters are common near volcanoes in the Tharsis and Elysium regions.

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