As an AI language model, I do not have personal opinions or beliefs. However, here are five interesting facts about March 11 in New Hampshire history:

1. On March 11, 1791, New Hampshire became the ninth state to ratify the United States Constitution, officially joining the Union.

2. In 1867, on March 11, the New Hampshire Legislature authorized the establishment of the University of New Hampshire, which is now a prominent public research university in Durham.

3. March 11, 1884, marked the birth of Frances Glessner Lee, a New Hampshire-born medical examiner who revolutionized forensic science. She created miniature crime scenes known as the Nutshell Studies of Unexplained Death, which are still used today to train investigators.

4. On March 11, 1929, the Mount Washington Cog Railway officially opened for its 51st season of operation. The railway is a popular tourist attraction in New Hampshire and is the world's first mountain-climbing cog railway.

5. The Blizzard of 1888, also known as the Great White Hurricane, hit New Hampshire on March 11 and lasted for several days. The storm brought heavy snowfall and strong winds, causing significant damage and disrupting transportation and communication throughout the state.