However, after crossing into Wyoming they made a major detour away from the future trail. The description in Stuart's journal shows that they looped (as the crow flies) north into the Teton Valley in Idaho and crossed Teton Pass into Jackson Hole. They then made their way south, reaching the general vicinity of the future Oregon Trail in Wyoming on October 19. Without the detour, they could have arrived at the same location within a matter of days after leaving Idaho for the first time. They then turned northeast and crossed South Pass on the Continental Divide two days later. Stuart wrote, The summit of this mountain, whose form appears to be owing to some volcanic eruption, is flat, and exhibits a plain of more than 3 miles square (7.8 km²)