This short, steep climb is not far from Interstate 15 in Cajon Pass. The decomposed granite surface is both hard and slippery at the same time. I'd taken this hill one week prior using the 35-inch BFG Mud-Terrains, so replicating the same hillclimb with the Dune Grapplers seemed a fitting litmus test. The Grapplers conquered just as the BFGs had previously. For an all-encompassing test, these tires still need to go through the rest of the wringer: deep sand, mud, and rocks. For those whose primary terrains are pavement and hard packed dirt: Look no further.