Sparks crews were called to a large fire involving multiple RV’s at Gandolfo Rodeo Arena on Loop Road around 2am this morning. Sparks responded with three structure engines, one patrol vehicle, and a water tender. Truckee Meadows Fire & Rescue were also there with an engine and water tender. A fire investigator is working to figure out how it started. No injuries were reported. The extent of the damage has not been released.