Difficulty and Terrain Ratings
Caches at Geocaching.com are rated between 1 (easiest) and 5 (most difficult) on two criteria: terrain and difficulty.
The terrain rating lets you know what the trip to the cache location is going to be like:
- 1: handicapped accessible
- 5: requires specialized equipment (for example, SCUBA or rock-climbing gear, a boat, or a 4WD vehicle) and the skill to use it.
The difficulty rating lets you know what the search is going to be like once you get to ground zero:
- 1: in plain sight
- 5: requires specialized equipment/skills to find
In the case of a puzzle cache, the difficulty rating also reflects the challenge of solving the puzzle to obtain the actual coordinates.
ClayJar, who has several geocaching.com services, provides an online geocache rating system. Fill in the data and submit the form, and it spits out a rating.