The Snake River was a major obstacle for Oregon Trail pioneers, not because it was "in-portent," but because it required them to cross a wide, fast-moving river with strong currents and unpredictable weather conditions. This was a dangerous undertaking, especially considering that the pioneers had limited resources and often lacked proper equipment for river crossings.
The Snake River was significant to the Oregon Trail because it presented a formidable challenge for pioneers on their westward journey. The river marked a challenging juncture in their travels, and successfully navigating it was crucial to their progress and survival on the trail.