Drop Zones

Drop Zones are one of the Hot Spots in Steep

Description
Drop Zones are what drive exploration in Steep. Once found, they can unlock new areas which can then unlock new Hot Spots. If you're stuck trying to find them keep and eye out for white stripes on the map, which means you've found in the nearby general area a Drop Zone, but you haven't actually come close enough to unlock it. They'll show up on Mountain View once you've gotten somewhat close, so by looking at the map you can figure out where in the general area.

How To Unlock / Find
If you see a notification pop up "New Drop Zone Detected" pull out to Mountain View, hit (the Middle Mouse Button) which will flag it, and then use one of the sports to get closer there or hit  which opens up your Binoculars if you're close to then unlock it!