Use the 2-out-of-3 Rule: If you’re not vaccinated, make sure your activity meets two out of the following three conditions: outdoors, distanced and masked.
Outdoors + Distanced = No Mask Needed
Outdoors + No Distance = Mask Needed
Not Outdoors + Distanced = Mask Needed
If you stop to have an extended conversation with someone who isn’t vaccinated, masks are recommended. Even outdoors, your risk of breathing someone else’s air increases the longer and closer you stand to them.