MISSOULA, Mont. -

As a heat wave engulfs Montana, one of the region's biggest events comes to Missoula.

The Missoula Marathon draws thousands of runners from across the country and around the world. For this edition of the race, expect temperatures to rise quickly during the race.

Starting at 6 a.m., the temperature is forecast to sit right around 60 degrees. After about 2 hours many runners will near the halfway point, and temperatures will reach the low to mid 70s. By the time many of the full-marathon runners reach the finish, the Missoula Valley will be above 80 degrees, on it's way to the 90s.

Saturday's 5K will escape the 80-degree mark, but will start in the low 60s at 8 a.m.

Organizers from Run Wild Missoula have a few tips to keep cool. First of all, stay hydrated. There will be 15 aid stations on the full marathon route for a rest and a fill-up of ice cold water. Organizers also recommend dressing for the heat, wearing thin layers and lightly colored clothing that doesn't absorb as much heat. 

See a map of the marathon route here.