Located just 70 km south-west from Chiang Mai in Northern Thailand, Doi Inthanon National Park makes a great day (or two) trip while visiting Chiang Mai. Doi Inthanon mountain is also the highest one in Thailand. I rented a scooter for a day and headed off 9 am in the morning.
The next waterfall I stumbled upon was Wachirathan falls. Being the most popular and one of the biggest waterfalls In Doi Inthanon National Park it had the most amount of visitors as well. That being said, there were only a few small groups besides me. An impressive waterfall with a cascade of drops following on the lower level. 
Sirithan waterfall is really close to Wachirathan but has fewer visitors. Besides getting a nice view from the viewing platform, I took a small, muddy and slippery path down to the foot of the waterfall as well. Being right next to the powerful water dropping down is an amazing experience. 
The 4th and last waterfall I managed to visit was Siribhume falls. This was definitely one of my favourite stops in the National Park. The short route to the base of the falls goes through a beautiful park full of graceful ferns. Siribhume waterfall consists of two different falls and the environment around is really peaceful. 
Due to visiting the falls in the rainy season, the waterfalls are more impressive and I really enjoyed seeing them. Also, the visitor numbers are smaller and I got most of the waterfalls just for myself.
Waterfalls
I had not made a lot of research about the park before so while arriving I was pleasantly surprised about all it has to offer. Right after turning away from the highway and entering the national park you will encounter the first waterfall. The entrance fee to the National Park is 300 TBH (7.5 €) and it allows to discover and drive around all of the park. Mae Klang waterfall is right next to the south entrance of the Doi Inthanon National Park. It is a short walk up the lower level. After taking photos with the sign it is possible to head a little bit more forward to the upper level of the waterfall. It is not really possible to get on the river during the raining season but sitting on of a rock and enjoying the view with water flowing in front makes it a great rest after being driving the motorbike for some a while. The next waterfall I stumbled upon was Wachirathan falls. Being the most popular and one of the biggest waterfalls In Doi Inthanon National Park it had the most amount of visitors as well. That being said, there were only a few small groups besides me. An impressive waterfall with a cascade of drops following on the lower level. Sirithan waterfall is really close to Wachirathan but has fewer visitors. Besides getting a nice view from the viewing platform, I took a small, muddy and slippery path down to the foot of the waterfall as well. Being right next to the powerful water dropping down is an amazing experience. The 4th and last waterfall I managed to visit was Siribhume falls. This was definitely one of my favourite stops in the National Park. The short route to the base of the falls goes through a beautiful park full of graceful ferns. Siribhume waterfall consists of two different falls and the environment around is really peaceful. Due to visiting the falls in the rainy season, the waterfalls are more impressive and I really enjoyed seeing them. Also, the visitor numbers are smaller and I got most of the waterfalls just for myself.Doi Inthanon peak
The road takes you straight to the peak, which is at 2565 meters above sea level. It gets noticeably colder when reaching the higher altitude. It was not the most pleasant feeling driving a scooter with only a t-shirt, shorts and flip flops on. Doi Inthanon is actually part of the Himalayan mountain range, being the last part of the system in the eastern side. It is possible to get great views on the way to the top and of course from the peak itself but unfortunately, I was there on a cloudy day and did not manage to get any.Cloud forest
Just next to the peak is situated Angkha Nature Trail, which heads through so-called “cloud forest” for 340 meters. The swamp forest trail is mainly based on a wooden pathway. The path was really better than I expected. Walking in a peaceful environment while listening to sounds from birds and observing the differences in a swamp forest really made my day. The Royal Twin Pagodas
Another popular site in Doi Inthanon National Park is the Royal Twin Pagodas. These temples were built at 1987 and 1992 to honour the Thai King and Queen’s 60th birthdays anniversary respectively. The pagodas are situated in a beautiful surrounding and besides visiting the temples and Buddha images, the views on a clear day are probably amazing.Making it a loop
After visiting the peak I decided to start heading back to Chiang Mai. Instead of taking the same highway, I saw on the map the possibility to take smaller roads back from the other side, by making it a loop. The road was really good quality and driving on the winding road through hills and thick forests on both sides was just a great experience and feeling. It took a longer time on the motorbike, so I arrived back in Chiang Mai by 7 pm. The whole distance covered during the day was about 230 km. If you have more time in your hands, I really would recommend staying a night in the National Park. There are some guesthouses around and it gives you more time to discover the park. There are several more waterfalls, hot springs and walking trails to pay a visit to.