Take Highway 6 over the Platte River. You should pass Linoma Beach the cross the Platte River. . Just past the Platte, turn right on Highway 63/66 (the map calls it 63, the state changed the name to 66). There is no highway marker sign, just a sign to go the the National Guard camp. You will cross a railroad track right after the turn. . You will pass the Nebraska National Guard Camp entrance. The highway comes to an intersection. If you go straight you will now be on gravel. Turn right, go North. The map calls this highway 63, the sign calls it 66. You will go north for a short while. You will take a wide sweeping curve to the left and the range will be on your right.
If it is a big meet (ECTC), be careful as parking is at a premium and traffic on the highway can be a danger.