Heavy October rains raise Lake Powell nearly 11 feet

Heavy rainfall across southeastern Utah and the Four Corners region has sent a surge of water into Lake Powell, raising the reservoir nearly 11 feet, as of October 25, and providing a welcome, if temporary, boost to one of the Colorado River system’s most important water supplies.

An aerial view of Reflection Canyon at Lake Powell showing sandstone formations exposed by declining reservoir levels. Recent October storms raised Lake Powell nearly 11 feet as of October 25, 2026, although the reservoir remains well below full capacity. Photo courtesy of the National Park Service.

According to the U.S. Bureau of Reclamation, Lake Powell stood at 3,527.51 feet above sea level on Sunday, October 25, up 10.89 feet from its September 15 low of 3,516.62 feet. The increase represents more than 615,000 acre-feet of additional stored water.

Much of the increase has come from unusually heavy rainfall in the San Juan River watershed, where recent storms produced widespread flooding across portions of Utah, Colorado and New Mexico.

Inflows into Lake Powell surged to more than 63,000 cubic feet per second on October 22, compared with approximately 6,600 cubic feet per second being released through Glen Canyon Dam.

The San Juan River, which ordinarily contributes a relatively small share of the reservoir’s October inflow, has supplied a substantially larger portion of the water entering the lake this month.

Gene Shawcroft, chairman of the Colorado River Authority of Utah, told The Salt Lake Tribune that the increase was particularly significant for this time of year, when reservoir levels typically decline.

However, officials caution that the recent gains do not reverse the long-term effects of drought and declining Colorado River flows.

As of October 25, Lake Powell remained more than 172 feet below its full-pool elevation of 3,700 feet, with roughly one-quarter of its total storage capacity filled.

The reservoir’s low levels have raised concerns about future water deliveries and hydroelectric generation at Glen Canyon Dam, which supplies power throughout the Southwest.

The recent storms have also demonstrated the unpredictable nature of water supplies in the desert Southwest. While the additional runoff benefits the reservoir, flooding along the San Juan River has threatened communities and damaged infrastructure upstream.

Additional runoff from the watershed could continue raising Lake Powell’s level as floodwaters move downstream. For now, the autumn storms have delivered an unusual late season gain to a reservoir that remains central to the region’s water future.