Howard Prairie Lake

As of September 30, 2026, Howard Prairie Lake is filled to 48.0% of its total capacity, holding roughly 37 hm³ of water out of a maximum 77 hm³. At this level the reservoir is within its normal operating range.

Over the most recent week on record the fill level has held broadly steady (-0.4 pts), and it is 28.0 points below its level on the same date a year earlier.

Across the readings we hold for Howard Prairie Lake — 2186 data points between October 2, 2021 and September 30, 2026 — the level has ranged from a low of 3.5% (October 7, 2021) to a high of 93.4% (May 21, 2025). On average the reservoir is fullest around May and at its lowest around October.

It is operated by BOR primarily for multiple purposes. It lies within the Oregon basin at 42.217°N, 122.378°W.