Recent U.S. Army Corps of Engineers counts through late September show over 415,000 adult fall Chinook already past Bonneville Dam, placing the run among the stronger ones in the past decade and supporting in-season Technical Advisory Committee projections of roughly 606,000 total adult fall Chinook entering the Columbia River mouth. Daily visual counts and stock sampling continue to track bright and tule components, with passage rates now driven by remaining October migration timing influenced by river temperature, flow, and historical run curves maintained by Columbia Basin Research DART. Water temperatures above seasonal norms have slowed upstream movement in some cohorts, potentially shifting more fish into the final weeks before the October 31 cutoff. Daily USACE ladder counts and any revised TAC updates through late October remain the key data releases that could alter final tallies.