Transportation and mobility for community participation is difficult for persons with Autism Spectrum Disorders (ASD) under normal circumstances, but the impact of COVID-19 made access even more challenging. Researchers used a single-subject design to examine patterns of change from before and after the COVID-19 pandemic in community mobility and participation as measured by GPS and daily participation questionnaires. Participants were young adults with ASD between the ages of 21 and 27 (4 males, 2 females) who were enrolled in a subsequent study. Community mobility and participation decreased for all participants in both essential and non-essential activities. Additionally, the number of trips for participants decreased substantially in the after COVID-19 periods, as did the variability in modes of transit.