MudRunner

Downhill Map, huge field in the center of the map.

On the challenge "Crane Operator," you are spawned near a pair of villages. Drive towards the first village and on your right, inside the breakable fences, are about 10 pumpkins in what appear to be a front lawn. Run those all over and then drive over to the village across the main road you originally drive up on and there should be another patch o pumpkins very similar to the last. Now go back to the main road and continue driving forwards. To your left should be a very large patch of 20-30 pumpkins. Is you ran all of those pumpkins you should either have the achievement or be very close. If you aren't quite there, restart the challenge, and go to one of the first patches and you should get it in your first few. Happy hunting!