About 250 wooden steamboats operated in the Yukon River drainage at the height of the Klondike era. The sternwheelers became gold-rush icons. But the hardy, pragmatic riverboat men were lured by profits, not romance. It was a tough, risky business. The season was short. A navigation error could sink or strand an enormous investment. The steamboats consumed huge amounts of firewood. And if a riverboat didn't find a safe berth or dry dock before freeze up, it risked being crushed by ice the following spring.