/run is on tmpfs for most systems these days. It's ethereal and
disappears whenever you reboot. The folders and files thereunder are
recreated by the services that need them.

$ mount | grep "/run"
tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=1639308k,mode=755)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
tmpfs on /run/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=3278600k)


Chad