Be clear about what this river is for
The Virgin is not a sport fishery in the usual sense, and the agencies that manage it say so. Zion National Park's fish page allows fishing with a Utah license for anyone 12 or older, then adds that it is a far more successful activity at the nearby reservoirs than inside the park. Downstream, the river's value is its native fish. The Virgin River Program, a partnership of local, state and federal agencies, describes six native species in the system: woundfin, Virgin River chub, Virgin spinedace, flannelmouth sucker, desert sucker and speckled dace. Several are endangered or considered sensitive in Utah, and three are found nowhere but the Virgin River basin.
If you came for trout or for a chub on a fly, adjust the plan. Roundtail chub, which Utah's Division of Wildlife Resources promotes as a native sportfish on the Green, Colorado, Dolores, Escalante, San Rafael and White rivers, are not on that list for the Virgin. The chub here is the Virgin River chub, a different and endangered fish.
The release list and the no-take list
Two rules in DWR's 2026 fishing guidebook do most of the work on this river. First, the Virgin River chub and the woundfin are on Utah's prohibited-fish list: if you catch either, you must release it alive immediately. Second, you may not take any nongame fish except common carp from the Virgin River main stem and its North and East forks, and the same ban covers La Verkin Creek, Ash Creek, Fort Pierce Wash, Beaver Dam Wash and the Santa Clara River below Pine Valley Reservoir. That protects the spinedace, the suckers and the dace, and it rules out collecting any of them for bait.
The one fish DWR wants taken out is smallmouth bass. The guidebook's entry for the Virgin River in Washington County carries a single line: no limit on smallmouth bass. Trout fall under the statewide limit of four, and you need a Utah fishing license like anywhere else in the state; the Zion regulation is the same license for everyone 12 or older. The Virgin River Program says woundfin are one of the rarest fish on earth, found only in a small section of the Virgin, and that it stocks hatchery woundfin into the river every March; the Virgin River chub, it says, is found only downstream of La Verkin Hot Springs. Anything silvery and small below Hurricane deserves a careful look before you decide what it is.
Zion's forks and the trout that do not last
In Zion, the North and East forks of the Virgin and their tributaries still hold all four native species that reach the headwaters, in healthy numbers, and the park says no comparable river system in the southwest can claim that. It credits flow that is essentially natural, with floods, heavy sediment and low water all intact. The Virgin spinedace, 4 to 6 inches long and silver, lives in both forks in the park and, in the Program's words, looks, feeds and acts like a miniature trout.
Rainbow trout are the most common invasive fish in the park, with occasional Bonneville cutthroat, brook trout, brown trout and channel catfish. The park is blunt that none of them survive in high numbers because the Virgin's steep grade, silt and flash floods do not suit them. Any trout you catch in Zion is a visitor from somewhere else. Zion also warns about cyanobacteria blooms in its rivers and notes that the toxins can build up in fish tissue, which is another reason not to plan a meal around the river.
A gauge that measures floods more than fishing
The gauge on this page is USGS 09408150 near Hurricane, below the Zion forks and above St. George. Its record since 1967 shows a desert pattern: median monthly flows of about 150 to 185 cfs from January through March, a peak near 230 in April, about 190 in May, then roughly 87 in June and July and 95 to 105 from August through November. The Virgin River Program describes the river as swinging between extremes, from a warm, thin flow in the summer heat to cold, violent water during spring runoff and flash floods.
No shop or agency publishes a fishing range for this gauge, so the 80 to 160 cfs band here is simply the typical summer-through-winter flow from that record, when the river is low enough to walk along. The number that matters more is a sudden jump: a summer storm upstream can raise the river fast and fill it with silt, and in the narrow canyons of Zion that is a safety issue before it is a fishing one.
Bugs for bass and dace, not a hatch calendar
Nobody publishes a hatch chart for the Virgin, and it is not a river where anglers time trips to insects. Zion's fish page says the spinedace are mostly insect eaters and the dace feed on insects, plant material and zooplankton, so the aquatic life is there, but the chart below is only general desert-stream timing for midges, small mayflies, caddis and summer terrestrials. For the smallmouth that DWR wants removed, a small crayfish or sculpin pattern and a popper in warm months are more useful than anything on the chart.
If what you actually want is a trout near St. George, DWR's own stocking records point elsewhere. Sullivan Virgin River Park Pond, one of Washington County's community fisheries, received rainbow trout several times each winter, between November and early April, in 2024, 2025 and 2026. Upstream, DWR stocked tiger trout in the East Fork of the Virgin in Kane County on April 27 and May 21, 2026. Community ponds carry their own rules and limits in the guidebook, so read that page before you keep anything.