Chamber Springs, the kayak park and WOKA
AGFC dedicated the Upper Illinois River Water Trail in May 2026, the first of its water trails in Northwest Arkansas and the first to cross a state line. It is 15.5 river miles with three accesses: Chamber Springs, at the 1922 Luten arch bridge east of Siloam Springs; the Siloam Springs Kayak Park at Fisher Ford, 8.1 miles down; and WOKA Whitewater Park in Watts, Oklahoma, another 7.4. Both parks have Class II-plus drops, and AGFC tells floaters they are welcome to carry around them. Above Chamber Springs, Float NWA runs an 11-mile, four- to five-hour float from the Highway 16 bridge at Savoy.
The kayak park is free most of the year, but between Memorial Day and Labor Day weekend parking costs $10 a car. The banks are the problem: AGFC warns that much of the river runs through private land marked by fences, signs or purple paint, and its smallmouth plan names the Illinois as a stream where landowners keep closing historic access. Fish from the boat or from the accesses.
Highway 16 is the gauge that still counts
USGS 07195430 south of Siloam Springs stopped reporting discharge after September 30, 2025 and now reads only stage, so this page uses 07195400 at Highway 16, between Chamber Springs and town. It is the gauge AGFC links, and AGFC's advice is the Ideal Flow here: 200 to 1,000 cfs is the best floating level, below 200 may be too low, and above 1,000 is for experienced paddlers. Float NWA sets its floor at 150. From September 10 to 24, 2026 the gauge sat between 213 and 278 cfs, inside the band the whole time, while the Savoy gauge upstream read 23 to 35. AGFC's Kirsten Bartlow says the upper Illinois generally has a constant flow; the long-term monthly means still run from about 320 cfs in August to 1,260 in April.
Where Lake Frances used to be
Two and a half miles into Oklahoma, GRDA's river map marks WOKA at mile 2.6 and the Lake Frances dam at 2.7. The lake behind it was drained in 1989 and 1990, part of the spillway failed in a May 1990 flood, and The Frontier reports that the collapse exposed sediment high in phosphorus and cut a lake of several hundred acres back to the width of the river. The dam was never removed; WOKA, opened in August 2023, is built around what is left. Siloam Springs still takes drinking water from the river above it.
Thirty years of phosphorus
The Illinois has been argued over since Fayetteville applied for a sewage permit in 1985. In Arkansas v. Oklahoma, decided February 26, 1992, the Supreme Court let Arkansas discharge but held it to Oklahoma's water quality standards, and Oklahoma now caps total phosphorus in its Scenic Rivers at a 30-day geometric mean of 0.037 milligrams per liter. Attorney General Drew Edmondson sued 14 poultry companies in June 2005. On December 19, 2025 Judge Gregory Frizzell ordered a remediation program of at least 30 years; a roughly $44 million settlement followed in July 2026, the Tenth Circuit stayed the judgment in August, and on September 22 the parties jointly asked him to vacate it. None of it changes a fishing rule, but it explains the algae you see in a hot, low August.
One bass in Arkansas, a permit in Oklahoma
Since July 1, 2026 the Illinois is a Blue Ribbon smallmouth stream: the guidebook allows one smallmouth a day, 15 inches or longer, replacing the old two-fish, 14-inch rule. There are no section boundaries, tackle limits or closed seasons on the Arkansas reach. Spotted and largemouth bass fall under the statewide combined limit of ten black bass. You need an Arkansas fishing license at 16.
Float past the line and Oklahoma's rules take over. Anyone in their own canoe, kayak or tube needs a Private Float Permit, $1 a boat per day or $10 a year from GRDA's Tahlequah office at 918-456-3251, and glass and foam coolers are illegal on the river and its gravel bars.
Neosho bass, spotted bass and what they eat
The native smallmouth of this drainage is the Neosho form, and it has not fared well. A 2018 USGS-led study found stocked Tennessee lake-strain genes most widespread in the Illinois, where the overall proportion of Neosho alleles was only 0.422, and AGFC's smallmouth plan calls for a statewide genetic check. ODWC notes Neosho fish rarely pass 14 inches, so the 15-inch rule means most smallmouth go back. A local fly blog says the Arkansas stretch holds a lot of spotted bass.
ODWC's advice for its stream smallmouth applies upstream too: the best fishing runs from late spring into early fall with the water above 60 degrees, and the spawn falls between 60 and 75. Its fly list is a size 2 Clouser in sculpin or silver shiner, a size 2 bead-head Woolly Bugger, size 8 to 12 stonefly nymphs, a Betts popper and a size 6 rubber-legged hopper; the Oklahoma guides add madtom and hellgrammite imitations. In winter MDC's rule holds: the fish slide into the deepest boulder pools and stay put.