The Gallatin County Sheriff’s Office is investigating an assault reported on Monday night near Hyalite Reservoir.

According to a news release, a woman told police a man approached her from behind at about 10:30 p.m. Labor Day near the restrooms at the day-use area by the Hyalite Reservoir dam.

The woman was coming out of the bathroom, Sheriff Dan Springer told the Chronicle on Wednesday, when the man grabbed her from behind and fondled her breasts before she was able to reach her pepper spray and spray the man.

He then let her go and ran off into the woods, Springer said. The woman was not injured.

The incident was reported by about 11:30 p.m., after the party had driven down to the bottom of the canyon to get cell service.

Deputies used drones and K-9 units to search the area and try

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