Cenarion Circle Reputation Guide
The Cenarion Circle is one of the original factions in the game. The Cenarion Circle's main hub is in Moonglade and Silithus. The fastest way to raise your reputation with the Cenarion Circle is via the Ruins of Ahn'Qiraj or Ahn'Qiraj. Both of these areas are raid zones, from Classic WoW. Players won't be able to solo Ahn'Qiraj, but may be able to do some of Aq20 (Ruins of Ahn'Qiraj) without help.
For the normal solo player the fastest possible way to raise reputation is with the "Encrypted Twilight Texts" quest from Bor Wildmane. This quest requires you to collect 10 Encrypted Twilight Texts from the Twilight NPC's in different camps around Silithus. For A location of these camps look below.
A turn in for the quest requires 10 Twilight Texts and awards you 500 reputation. From friendly to max exalted this will take 86 turn in's of Twilight Text. Meaning you will need 860 texts. If you'd like to see a video of me farming the Twilight Texts click here.