Lake Challa is a crater lake on the border of Tanzania and Kenya. It is about an hour and a half drive from Moshi town. Lake Challa is a great day trip or the perfect place to camp for the night. The hike starts at the rim of the crater looking down on the beautiful lake. You will hike for approximately 45 minutes through savanna woodlands down to the lake. Spend the day swimming in the lake and relaxing on the shore before hiking back up the crater walls. At certain times of the year, you can sit on the deck overlooking the lake and watch families of elephants, monkeys, and baboons drink out of the watering holes, which are adjacent to the lake.