I figured terrain would be an issue.
13000 feet AGL at 24 NM is 540 ft/NM. That's pretty steep. At 180 knots groundspeed that would require just over 1600 ft/min descent rate. At 240 it would require just under 2200. Distance required to slow and configure would further steepen the required descent angle.
Perhaps someone with experience in the Dash can let us know whether those descent rates are practical.