With 24 records split across three species, Frances reads as the strongest tributary fishery in the Forster system, but the channel-geometry numbers only tell part of the story. Median width runs ~10.6 m (narrow to moderate) on a gentle ~1.42% gradient, with peak mean-annual discharge around 3.516 m³/s (low to moderate flow), geometry that could support easy wading through most of the season. The stronger bet is the lake and wetland-connected side water the habitat inventory flags for fry refuge and rearing, plus the water around the Akenside confluence, rather than pushing the open mainstem end to end.
Forster Creek tributary
Lake/wetland-connected rearing water
24 fish records
Rainbow, brook trout, westslope cutthroat
Wade
Backroad access, no named trailhead
Wetland refuge, and a system cut off from the Columbia
Tributaries flowing from plateau lakes into Frances are flagged as important fry refuge and rearing habitat, and vulnerable to road crossings, grazing and logging disturbance. Don't assume Columbia River fish can quickly repopulate this water: the falls lower in Forster Creek isolate most of the Frances system from the mainstem.