How many miles in 2000 cubits?

I believe 2000 cubits would be about 2,900 feet.

The 'common cubit' was roughly the distance from a man's elbow to the tip of the middle finger, often figured to be around 17.5 inches. (According to the Siloam Inscription, for instance, King Hezekiah's water tunnel is '1,200 cubits long' and modern measurements put it at 1,749 ft)

NOAH'S ARK measured 300 cubits long, 50 cubits wide, and 30 cubits high (or 437 ft 6 in. × 72 ft 11 in. × 43 ft 9 in., giving it 1,400,000 cubic feet in gross volume (or 96,000 square feet of living space on three levels)(Genesis 6:14-16)

The 'Ark of the Covenant", on the other hand, measured: 44" × 26" × 26" (Exodus 25:10, 11)