Studies seem to indicate that social distancing is enough and that people really don't need to wear masks outdoors. This is especially true when the sun is shining as direct sunlight is a disinfectant.

It appears that the sun activates Vitamin D and improves immune system response.

Walks in the sunshine are not only safe. It is likely that they will improve one's health. Social distancing (avoiding crowds) and not touching things is the key for outdoor activity.