Mahakam upstream offers you a beautiful ecotourism and inland cultural experience.
The area is rich with Borneo wildlife and local fishermen activity. Especially in the Muara Kaman nature reserve, where you can spot the unique river dolphin, proboscis monkeys, long tail monkeys, hawkeagles. On top of that, you can go fishing on Semayang lake and visit traditional Dayak villages.
Muara Kaman nature reserve is about 3 hours drive from Samarinda.