The Soberanes Fire began from an illegal campfire on 22 July 2016 in the Garrapata State Park in Monterey County, California (36.46 °N, -121.90 °W). Over the following three months, the fire burned over 132,000 acres. Presented here are aircraft measurements of CO2, CH4, O3, and HCHO from five flights near and downwind of the Soberanes wildfire, collected as part of the Alpha Jet Atmospheric eXperiment (AJAX). In situ data are used to determine emission ratios (ERs), or excess mixing ratio relative to CO2, with particular emphasis on the evolution of methane ERs over the lifecycle of the fire. In addition, measurements of NOx and O3 from a coastal mountaintop site are presented and are used to estimate O3 production rates during the Soberanes Fire burning period. Lastly, the extent of ozone enhancement and air quality impacts downwind of the fire will be addressed using ground-based monitoring data, the NOAA Hazard Mapping System (HMS) smoke product, and the HYSPLIT trajectory model.