This news from the Arlington Now website:
And here's the Arlington County report:
This is a very disturbing bit of news. It's still under investigation. Given more traffic is out on the trails in the summer season and the growing popularity of cycling, it seems a very good time to ask that we all review how we operate on the roads and trails out there. And I'll refer back to some earlier posts on safety.
(Note: the posts below refer to the Cap Crescent Trail, but trail use rules and regulations are similar. The CCT has a speed limit for bikes--Four Mile Run does not.)