Kahului, tucked into the north side of the valley near the airport, is one of the most populous areas of the island, and home to one of the longest stretches of beach on Maui. There is also a nice section of bike path which parallels Stable Road (near the airport), so this area has two good options for either an out and back, or a loop combining bike path and beach. The sand of this north shore inlet is nice and compact — great for beach running. Note: this is a hot one. Make sure to set out as early in the morning as you can muster.