Yesterday we saw the roll out of Android 7.0 Nougat across Nexus devices that were already involved in the beta program. If you were still on a version of Marshmallow you had the option of joining the beta program or being left out in the cold. Google has finally released the stock images for manual installation at the developers website. So far there are images for the Pixel C and Nexus 6P. Stock images should show up for other devices as the day progresses!
To install these you will need to be bootloader unlocked, have fastboot and adb files on your PC, and will then need to run the flashall.bat. The process is actually not all that difficult. Head to the link to grab the image for your device.
via Google