Otter Bar is a premier riverside campsite on Idaho's Middle Fork Salmon River accessible only by multi-day float trip (permit required through U. S. Forest Service).

Notable for one of the largest beaches on the Middle Fork, it offers excellent fishing opportunities and ample space for groups, with primitive camping (no potable water, pack-out waste system, fire rings when permitted).

Located in the Frank Church-River of No Return Wilderness near Challis, it serves as a strategic overnight stop for rafting and kayaking expeditions.