Hitting the Trail can have a lot of meanings. While it might imply embarking on an adventure or going for a long walk, it can also signify bidding farewell, leaving a place or saying goodbye. Some of the antonyms for hitting the trail could include staying put, lingering, remaining stationary, or settling down. Instead of embarking on an adventure, one could be planting roots, staying grounded, or simply taking a break. Rather than bidding farewell, one could be welcoming, returning, or even beginning anew. It all depends on the context and the intention of the phrase.