Yes, it is still totally ok to go outside with your family. There are dozens of trails in the St. Louis area that are quiet and have few crowds so I'm going to feature some regularly here to help everyone do some social distancing while also getting some much needed sunshine (the sun will come out eventually, right?) and fresh air.
I'm going to start with one that's really pretty and a good choice for early spring because it has a lot of open, unshaded areas that might be a bit too warm come late spring or summer. Valley View Glades is close to Hillsboro, MO, and about 45 minutes or less from the St. Louis area. It's a quiet little conservation area run by the state with one loop trail that hugs the area's perimeter. It has a couple active streams which should be especially lovely now and in the coming days what with all the rain we've been having.
Stay tuned for other hikes in the same area, and always feel free to comment or message me with suggestions!