At this moment, the Lily Camera does not have any obstacle avoidance capabilities (cost and design choice). We have found that most outdoor activities do not need obstacle avoidance because Lily can follow the user's path. But again there are no guarantees that Lily will not hit anything while it is following you. If Lily is about to hit an object you can press the middle button on the tracking device and Lily will stop, hold its position, and continue to film you.