The traditions of Dartmouth College, an American Ivy League college in Hanover, New Hampshire, are deeply entrenched in the student life of the institution and are well known nationally. Dartmouth's website counts the college's "special traditions" among its "essential elements", and in his inauguration address, former College president James E. Wright said that the school is "a place that is marked by strong traditions". Some of these traditions remain supported by the administration, while others are officially discouraged.

Dartmouth functions on a quarter system, and one weekend each term is set aside as a traditional celebratory event, known on campus as "big weekends" or "party weekends". In the fall, winter, spring, and summer respectively, these weekends are Homecoming (officially Dartmouth Night Weekend), Winter Carnival, Green Key, and Tubestock, the last of which has been canceled indefinitely and was replaced in 2006 by an event called Fieldstock.

Dartmouth Night starts the college's traditional "Homecoming" weekend with an evening of speeches, a parade, and a bonfire. Traditionally, the freshman class builds the bonfire and then runs around it a set number of times in concordance with their class year; the class of 2009 performed 109 circuits, the class of 1999 performed 99, etc.

The college officially discourages a number of student traditions of varying degrees of antiquity. During the circling of the bonfire, upperclassmen encourage the freshmen to "touch the fire", an action legally considered trespassing and prohibited by police officials present. At halftime of the Homecoming football game on the Saturday of the weekend, some upperclassmen encourage freshman to "rush the field", although no upperclassman has seen a significant rush since several injuries sustained during the 1986 rush prompted the school to ban the practice. Among the two or three students who sometimes run across the field, those who are arrested are charged with trespassing (the independent newspaper The Dartmouth Review claimed to set up a fund to automatically pay any fines associated with freshman who rush the field.) However, in 2012 this was proven false when two students rushed the field and were arrested for disorderly conduct. The Dartmouth Review ignored their emails until finally replying and denying that this fund had ever existed. These students then had to pay $300 fines out of pocket. For the 2011 Homecoming game, however, over 40 members of the Class of 2015 rushed the field at homecoming without any action taken by Safety and Security or the Hanover Police Department.

President William Jewett Tucker introduced the ceremony of Dartmouth Night in 1895. The evening of speeches celebrated the accomplishments of the college's alumni. Originally the event took place in the Old Chapel in Dartmouth Hall, and it moved outdoors within about fifteen years.

The focus of Dartmouth Night is the bonfire. Students had built bonfires during the late nineteenth century to celebrate sports victories, including one in 1888 that recognized a baseball victory over Manchester. An editorial in The Dartmouth criticized that fire, saying, "It disturbed the slumbers of a peaceful town, destroyed some property, made the boys feel that they were being men, and in fact did no one any good."

By the mid-twentieth century, Dartmouth Night was set to coincide with one of the several annual bonfires, and that pairing helped preserve the one bonfire that now remains.

In 1904, the Earl of Dartmouth visited the campus on Dartmouth Night with New Hampshire politician and author Winston Churchill and marched around the Green with the students. Early on, the tradition of reading out telegrams (later e-mail messages) sent that night from alumni clubs around the country began.