Yes, I have done a couple of rides on my own with the nearest little hills, and I could do a couple of slightly longer West Hills rides on my own too. Like I was just saying about something else, it's way better than nothing. It's all complicated by wearing a mask, and avoiding times when there might be a lot of pedestrians, and ... sigh. It's tiny in the scheme of things, but losing my long weekend rides with a friend is still a loss.
Re: Exercise is SO helpful