The reservoir is primarily used as storage for floodwaters in winter, but is filled for the summer recreation season. The reservoir is 6.4 miles long, 1,420 acres when full; the dam is 1,265 feet long and 270 feet high.
Water levels and boat ramp accessibility information is available from the Oregon State Marine Board website. Look for Blue River Reservoir in the section titled "Willamette Basin Reservoirs." Watch for obstructions near the shoreline such as submerged stumps, logs, and rocks. Small craft should stay out of open waters when it's windy since dangerous waves can build up suddenly.