From Wikipedia:
The Mount of Temptation is said to be the hill in the Judean Desert where Jesus was tempted by the devil (Matthew 4:8). The exact location is unknown and impossible to determine. It is generally identified with Mount Quarantania, Arabic name: Jabal al-Qarantal, a mountain approximately 366 metres (1,201 ft) high, towering from the northwest over the town of Jericho in the West Bank. According to the public domain Catholic Encyclopedia (1907-1914), Quarantania is “a limestone peak on the road from Jerusalem to Jericho”.