Cain took some time to prepare himself before he began scaling down the mountain. It took him far less time to descend than to ascend. However, it was still as perilous as before.
Soon, covered in minor bruises and scratches, he finally reached the base of the mountain. Soon, he got to witness how the Goblins and the Trolls got down from the mountains.
The Trolls we're earth-elemental creatures and thus, could manipulate the structure of the earth beneath their feet and make it flow like water, or turn it into hard spikes or hardened armor that could cover their bodies. Another thing for him to worry about...
Nonetheless, the Goblins arrived at the base of the mountain far quicker than he could. But since he was a few steps ahead, they were unable to notice him.