Visitors flock to the summit in the pre-dawn darkness to view the sunrise, so best to arrive at least an hour before dawn to secure parking and viewing spots. The drive from Kehei takes about 2.5 hours. The main trail into the crater - Sliding Sands Trail - is very exposed, so good sun protection is highly recommended. Plan to spend the entire day - colors within the crater change dramatically as the day progresses, offering otherworldly views. Enjoy!