Gila River — Gila Box

About

Gila Box Riparian National Conservation Area, Arizona — 1990. The canyon's human record runs deep. Before European contact, Mogollon and later Apache peoples used the Gila Box as a travel corridor and water source in the arid Gila Valley, and archaeological sites throughout the canyon document thousands of years of habitation. The river later drew a very different kind of use. From the 1830s through the 1920s, the watershed was logged to supply the regional timber industry of 1850 to the 1910s and the railroad expansion of the 1860s to the 1910s, worked by local sawmills, logging drives, and downstream lumber operations. That era closed as the old-growth stands were exhausted around 1910, state forestry conservation began in 1915, and state forests were established through the 1930s.

Hydrologists arrived on the heels of the loggers. The USGS surveys of the 1870s through the 1890s, the gauging-station work of the 1880s through the 1910s, and the state geological streamflow assessments of the 1910s through the 1930s formed the first comprehensive hydrological studies of the Gila here. Later, the state water pollution control studies of the 1950s through the 1970s and the Clean Water Act assessments from 1972 to 2000 reckoned with more than a century of logging, agricultural, and industrial impacts, work that continues today through restoration and TMDL programs.

The conservation area's protection was forged in conflict. Between 1986 and 1990, the fight against the proposed 200,000-acre Hooker Dam — a reservoir that would have flooded the Gila Box — drove the push to designate the canyon instead. Congress acted in 1990, protecting 23,000 acres of desert canyon and riparian habitat along the Gila River and Bonita Creek. The victory preserved the place rather than the reservoir, and made the Gila Box the first riparian national conservation area in the country.

What that protection guards is a green seam threaded through the desert. Bonita Creek runs lined with towering cottonwoods, sycamores, and willows, and it is the only year-round perennial tributary in the conservation area — the sole habitat of the rare Bonita diving beetle. The wider riparian corridor is the principal habitat of the endangered Gila topminnow and southwestern willow flycatcher, along with the threatened yellow-billed cuckoo. Between 2008 and 2024, riparian restoration protected 2,200 acres of the conservation area's cottonwood-willow gallery forest.

For paddlers, the 23-mile run divides into three moods. The Upper Gila Box opens with Class II water at the canyon entry. The Middle Gila Box, rated Class II–III, threads the deepest canyon and passes hot springs. The Lower Gila Box eases back to Class II as the canyon widens toward Bonita Creek. It is desert whitewater without a reservoir at the bottom — a flowing river left to do what standing water once nearly ended.