Absolutely! Haridwar, Rishikesh, and Mussoorie are beautiful places to visit. Here are some tips for your travel:

Best Time to Visit:
Haridwar, Rishikesh, and Mussoorie can be visited all year round. However, to beat the heat, it is best to travel between September and June.

Route and Accessibility:
The cities are well-connected by roadways and railways. Dehradun's Jolly Grant Airport is the nearest airport. From here, buses and taxis are readily available.

Altitude and Acclimatization:
Dehradun to Mussoorie is a steep climb, so travel prepared. If you're not used to high altitudes, take it easy the first couple of days until you acclimatize to prevent altitude sickness.

Accommodation and Booking:
Book your accommodation ahead of time, especially if you’re visiting during peak season. The places offer options ranging from luxury to budget accommodations.

Clothing and Essentials:
The weather can be cold, especially in Mussoorie. Pack warm clothing, good walking shoes, and other essentials like sunscreen and a hat. For Haridwar and Rishikesh, carry modest attire for temple visits.

Health and Safety:
Carry any personal medications you might need. Avoid eating street food if you have a sensitive stomach and keep yourself hydrated.

Local Etiquette and Respect:
These are holy towns, so local traditions must be respected. Dress modestly when visiting temples. Non-vegetarian food and alcohol are not encouraged, particularly in Haridwar and Rishikesh.

Enjoy the serene beauty of the mountains, the soothing sound of the river Ganga, and the pleasant climate in these towns. Have a wonderful trip!