How long did it take for Gregory Blaxland William Wentworth and Lieutenant Lawson to cross the Blue Mountains?

Gregory Blaxland, William Wentworth, and Lieutenant Lawson did not cross the Blue Mountains together, but rather led separate expeditions.

Blaxland's expedition, which included Wentworth, took 21 days to cross the Blue Mountains in May 1813, while Lawson's expedition took over two months, from February to April 1813.