The school has progressed from 3A to 6A in the last five years due to rapid population growth in Lehi, attributed to Silicon Slopes.

In 1912, the colors were changed from blue and white to purple and white, but it was not until 1925 that the mascot was changed to the Pelicans because newspaper reporters in Salt Lake City felt a wolverine was too violent to be a high school mascot.

Several additions came later including a grandstand, an auto mechanics shop, a choral music/band room, and an office area.

Lehi High School has undergone several renovations since its initial opening to accommodate the increase in student population and to meet seismic requirements.

[7] The percentage of students who met proficiency standards were as follows: Language Arts 88.28%, Mathematics 67.99%, and Science 58.81%, all above average for the state.

88% of those students were Caucasian, 7% Hispanic, 1% American Indian, 1% Pacific Islander, 1% Black, and 1% Asian.