+A **river source** marks the upstream point where a [river](/wiki/river) begins its flow, often a modest trickle that gathers strength. This genesis typically emerges as a [spring](/wiki/spring), meltwater from glaciers, or an outflow from a high-altitude lake.
+## See also
+- [Watershed](/wiki/watershed)
+- [Tributary](/wiki/tributary)
+- [Delta](/wiki/delta)