The correct spelling of "are the trail" is written as /ɑr ðə treɪl/. In this phrase, the word "are" is spelled with the letter "a" followed by the letter "r", which is pronounced as /ɑr/. The word "the" is spelled with the letters "t", "h", and "e", which are pronounced as /ðə/. Lastly, the word "trail" is spelled with the letters "t", "r", "a", "i", and "l", which are pronounced as /treɪl/. It is important to use proper spelling and pronunciation in writing and speaking to ensure clear communication.