Pitch and Run NYC is a community of runners started by VCs and founders and open to all. They meet at 9:00 a.m. every Monday and Friday at Chelsea Piers (Bluestone Lane Coffee) for a casual ~4.5 mile run at ~9:45 min / mile pace to riff on building, investing, and life in general. There is a chapter in Denver and more coming soon in Atlanta, Austin, Boston, and other cities. They frequently host events at major tech conferences and marathons.
Check out Pitch and Run at their website.