Complex sentence: It was expanded to 250 lap distance in 1994, but will be reduced to 105 miles in 2016 as part of an overhauling of the Richmond spring race weekend, including the new Dash4Cash format.
Split into simpler sentences: It was expanded to 250 lap distance in 1994. In 2016 as part of an overhauling of the Richmond spring race weekend, including the new Dash4Cash format.