Can I do a visa run and return to Thailand for another 30 days on a Canadian passport?

Yes, you can exit Thailand to a neighboring country and return for another 30 days of visa exemption with a Canadian passport. Although visa runs are allowed, it's important to check if you need to reapply for the Thailand Pass, especially due to COVID-19 regulations. There are no strict limits on the number of visa runs, but frequent trips might attract scrutiny from immigration. It's advisable to ensure you meet any remaining requirements such as COVID-19 insurance on re-entry.