RCMP in Pincher Creek say they were investigating a near head-on collision in which a vehicle had to swerve into the ditch to avoid being hit.
Police say the offending driver and passenger fled the scene, although the driver was found soon after and arrested.
Officers looking into a disturbance at the hockey arena discovered the passenger removing her clothes despite objections from staff.
Brittany Hourie is accused of indecent acts, causing a disturbance and obstruction of a police officer.
Tiffany Hourie is charged with impaired driving, leaving the scene of an accident and refusing to provide a breath sample.
Both women are expected to appear in court later this month.