The north side of the Snake had better water and grass than the south. The trail from Three Island Crossing to Old Fort Boise was about long. The usually lush Boise River Valley was a welcome relief. The next crossing of the Snake River was near Old Fort Boise. This last crossing of the Snake could be done on bull boats while swimming the stock across. Others would chain a large string of wagons and teams together. The theory was that the front teams, usually oxen, would get out of water first and with good footing help pull the whole string of wagons and teams across. How well this worked in practice is not stated. Often young Native American boys were hired to drive and ride the stock across the river—they knew how to swim, unlike many pioneers. In present-day Idaho, I-84 roughly follows the Oregon Trail from the Idaho-Oregon State border at the Snake River. Approximately east of Declo in present-day rural Cassia County, I-84 meets the western terminus of the western section of I-86. I-86 heads east, then northeast to American Falls and Pocatello following the Oregon Trail, while I-84 heads southeast to the State border with Utah. US-30 roughly follows the path of the Oregon Trail from Pocatello to Montpelier