How to get there:
1) Car/Scooter (bicycle?!): From Hualien City, take Highway 9 north towards Taroko. Drive through Taroko on Highway 8 and take in the beautiful scenery. Merge left onto Highway 14甲 and follow the signs to Hehuan Mountain (合歡山 Héhuānshān)
2) Public Transport: While there are public buses that run from the Hualien Train Station through a portion of Taroko Gorge, as far as I know there aren't any that go up to Hehuan Mountain. I did see some private tour buses up there, however.