I have rated each trail as either easy, medium, or hard. Easy trails represent trails that I consider to be no problem to most people. They are typically short trails and can be completed within several hours. They are not very strenuous and they don't encounter treacherous areas. No cables or ropes are needed for assistance because there aren't any really steep sections.
Medium trails are a little bit longer than easy trails, and are more strenuous.
Frequently, there are many steep sections that may require the aid of cables. There also may be several treacherous, narrow, or near vertical sections. Hard trails are long, very strenuous, and have several treacherous, narrow, and near-vertical sections. These trails are a real challenge and can take 8 hours or more to complete. The trail starts off by Waialua High School and crosses through private land.