Use maps
You should carefully study different maps before you head out to look for dens since the dens are often located on ridges. Access to aerial photographs would be of great assistance since you would be able to see the difference in vegetation around the dens. Follow streams since arctic fox dens are often dug into loose soil close to water.

Be systematic
To find new dens, you should go to places where you do not usually go, search for new areas and choose new paths. It is also important to search systematically.
Mark on the map where you hiked to make it easier for your next trip in search of arctic fox dens. You should also be aware of how you use time. Have a strategy for how you want to plan your hike and prioritise several well-defined areas.

 
Tracking in spring snow
If you have the opportunity to track in spring snow, this method can be very useful for finding dens in mounds of stones or mountain crevices. The arctic fox visits its den even during the winter. Often, one or more of the entry holes are kept open so the den is accessible when it is time to give birth.

If you find a den, you should be extremely careful, no matter the time of day or season. Read more under "If you find a den".