The 2021 H1 Unlimited season is the sixty-fifth running of the H1 Unlimited series for unlimited hydroplanes, sanctioned by the APBA. The 2020 season would have been the sixty-fifth running but that season was cancelled because of COVID-19.[1]
- ^ Morrow, Jeff (July 20, 2020). "Hydroplane races are officially canceled for 2020. There's still hope for an air show". Archived from the original on August 17, 2020. Retrieved July 18, 2021.