Decision Trees For River Crossing Choices

Moving water presents a range of hazards, and decisions around when and how to cross are often complex. Decision trees provide a structured way to think through whether a crossing is appropriate at all under current conditions, before any specific technique is considered. By breaking the decision into smaller questions, hikers can slow down the process and recognize when risk is increasing.

Typical river decision trees may prompt hikers to consider recent weather, snowmelt patterns, and time of day, as well as observable factors like water depth, current speed, water temperature, and the presence of debris. They also highlight environmental context, such as whether there are downstream hazards, safe eddies, or potential alternative crossing points.

Tree outcomes frequently include choosing not to cross, waiting for conditions to change, exploring upstream or downstream for safer options, or considering a larger reroute that avoids the crossing entirely. In many frameworks, “do not cross now” appears frequently as a reasonable and common result.

Because river conditions can change quickly, decision trees also emphasize re-assessment. What appears safe at first glance may look different after further observation or after speaking with other parties who have recently attempted the same crossing. When in doubt, many hikers favor more conservative choices, especially in remote areas.

This article focuses on the high-level structure of decision making around whether to attempt a crossing. It does not describe or endorse specific crossing techniques and is not a substitute for professional instruction or local safety advice.