Durability

• When searching for a GPS for hiking and biking, consider how much abuse it will need to withstand. Most GPS receivers have a waterproof rating, as well as a rating for durability and ruggedness.
  
  

Accuracy

• GPS receivers for hiking and biking are not all created equal, especially when it comes to positional accuracy. In general, it is best to use a GPS that utilizes a 12-channel parallel receiver system, which allows the GPS unit to receive information from multiple satellites, thereby increasing its overall accuracy.
  
  

Features

• Finding a GPS for hiking and biking that is right for you usually means comparing the device's bells and whistles. Some of the features you may consider include screen size, color versus grayscale, basic or advanced mapping capabilities and topographic mapping capabilities. Of course, these features will ultimately determine the price of the hiking and biking GPS.