Oh interesting. Looks like the City disagrees with other organizations then on the official name. The USFS, the USGS, and the Utah Geologic Survey all list the official name as "Bells Canyon"

https://www.fs.usda.gov/recarea/uwcnf/recreation/hiking/recarea/?recid=9033&actid=50

https://geology.utah.gov/map-pub/survey-notes/utahs-glacial-geology/bells-canyon/

https://edits.nationalmap.gov/apps/gaz-domestic/public/search/names/1438584