How to reach - We took the local bus leaving from the railway station in Dehradun. One way costs INR 60 - the fastest and cheapest way to get to Mussoorie. The bus drops you at the entrance of the town from where you can take the bus back to Dehradun.
Journey - not bad at all! Drivers are familiar with the sharp turns, may speed up sometimes. But then what else can you expect from a local bus journey. While going back downhill, it hardly took us an hour. To reach Mussoorie, it took us an hour and a half in which the last 30 min was the hilly drive. Pretty safe and not at all crowded (best to come on a weekday), it is way better than paying INR 1100 one way to cabs, if you are traveling in a small group.
From Delhi, it takes 5 hours by train to reach Dehradun.
What all you can do in Mussoorie - Visit the Kempty Falls and Happy Valley Explore Landour Cable car from JhulaGhat to Gun Hill What we actually did -
We could just manage a day trip to Mussoorie from Dehradun and had a train to catch at night. We preferred starting early around 6 pm from Mussoorie to descend safely. This left us with only 6 hours. And since I had food belly as my companion, we prioritized food over everything else - so here is our food journey:
Our first stop was at a maggie point. Finger-licking good hot Maggie at INR 40. Perfectly complemented the chill in the weather.
Second stop was to enjoy the best cold-coffee ever. This was at the Mountain Cafe on the Mall Road. Must go! Priced at 150, a bit over the top for just a cold coffee but then you take the first sip and realize it totally justifies the cost. This place has an extensive menu, so you can plan a good breakfast.