The Alaska Cup is a 600 km (320 mile) aerial race held annually in Anchorage, AK. The race course starts in Anchorage, heads down the Cook Inlet along the Kenai Penninsula, back up to Seward, over Turnagain Pass and back down the Turnagain Arm to Anchorage. The course is known for its challenging route, the unpredictable weather, and the risks of crossing the mountains. Several pilots have crashed on the route, though only a few crashes have been fatal. Still, the race continues to popular, both with the pilots who participate in the race and the spectators who flock to see the aircraft.