From Kalispell, take Rt. 93 north to Rt. Go east on Rt. 40 to the West Glacier, Montana, entrance to the park. Summer days are generally warm, cooling off at night, sometimes dry, sometimes rainy.
Winters are very cold and snowy.
Always be prepared for cool weather. The ideal time is July. The snow has left the low country, but still caps the higher peaks. Wildflower displays are at their best and the weather is usually good. August, too, is good for warm weather.