[5] Vagn Christensen — a high school teacher in the period 1936–1940 at Grundtvigs Højskole located at Frederiksværksgade 119, who had previously been on the first Danish gymnastics team sent abroad to perform — noticed an interest in the local community and the idea of establishing a sport club, using the school's old, little gym hall as a base, grew in the fall of 1936.

[5] Due to the huge interest present at the meeting, a decision was immediately made to form a work group, consisting of Niels Jensen, Oskar Petersen, Marie Madsen, Martin Petersen and Linda Sørensen, who were tasked to design the new laws and just one day later call for an additional founding meeting of a new gymnastics club.

[5] With spring approaching, the board recognized the need for outdoor sports activities during the summer months for its male members and in May 1937, association football and handball was added to the club's repertoire.

[5] Up until the 1960s, the then small football department did not draw great attention to itself, playing in the lower ranking regional leagues, primarily the SBU's A-række, with players such as Edvin Nilsson, Svend A. Nielsen og Charly Hansen as the most prominent names in the club's first thirty years.

[9][10][11][12] The club was renamed Hillerød Gymnastik- og Idrætsforening (abbreviated HGI) in the spring of 1968 after the debate regarding a name change had been initiated in 1962.

[5] The need for a name change was in part justified by a judgment from the Zealand FA, that ruled in favour of the away team, Køge, whose players were not able to find the playing ground for Ullerød GF during a league match in the 1960s, thinking that the home team were playing their matches in the district of Ullerød.

[20] During the first season, the men's association football team played on a grass field behind Grundtvig High School, at the location of the current Teglværksvej.

[5] Frederiksborg Slotssogn stood behind the 1958 construction of a new sports facility at the Selskov Stadium (which itself was built in 1954), consisting of a couple of association football fields and a small changing room on a hill.

[5] The expansion involved an area, that consisted of underground marsh lands and a water connection from Gribskov towards the lake at Frederiksborg Castle, which complicated the entire construction process.

[5] For several years, up until 1990, the athletic course in the southwest corner of the stadium had been used for motorcycle speedway races, often gathering attendances of up to 10,000 people, but new safety regulations and several noise complaints from neighbors resulted in this activity being moved to Slangerup.

[5] In 2005, Hillerød Municipality constructed a new association field, measuring 120x80 meters and name "Bane 8", at the area behind Ødammen in the east section of the sports center, which was officially inaugurated in 2008.

[5] The association football men's team are still playing their home games at Hillerød Stadium, historically at the exhibition ground surrounded by terraces (no grandstands) and a running track (referred to as bane 1) that can hold approx.

[5] It had a simple design consisting of a decorative interlacing of the three initials of the club, "UGF" for Ullerød Gymnastikforening, encased in a shield with .

Logos used in the history of the association football department/club: Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.