Yes. Theoretically, outdoor exercise is safer, but the exponential math behind a virus spreading has a lot to do with concentration in a population and that's a lot lower in Europe right now, because they waited for numbers to drop before reopening.

But you are reflecting misinformation in your post. Covid isn't worst in cities, though early deaths in the tri-state area and rapid early spread in cities with major airports made it appear that way. And your county in California is ABOVE the average COVID caseload.

https://www.worldometers.info/coronavirus/country/us/

I made and deleted a comment last night because I didn't like wading into local politics here, but in the area I live: a couple of largely suburban Northern Virginia counties eased restrictions before their neighbors and are still seeing a steady rise in cases and positive vs. the steady drop in adjacent areas despite having a lower number of tests / population than their urban, protest loving District to the North.

It takes a village to beat something like this the data clearly shows that there is spread is many rural places and in most suburbs despite lower testing numbers per 100k of people.