But if you are trekking alone, then I would recommend you taking a guide for 200-300 INR. This is because, although the path is simple, you might get hurt on the trek. And usually, there aren't many people on this route and there is barely any network signal as well. So, it would be better to either trek with other travelers or get a local guide for yourself.
Rainbow Waterfall Trek Route
For the Rainbow waterfall, you will need to reach the Double Decker Root Bridge first. From here, it is the straight path leading away from the Nongriat village.
After 5-10 minutes of walking, you will come across an open ground which would resemble a cricket or football ground to you. From here, it is another 10 minutes walk to the second suspension bridge which is connected to another root living bridge.
Once you cross this, your trek actually starts because it is an uphill climb for a while. Thankfully, there are a few steps here so you don't have to worry about slipping down to the bottom. For another 30 minutes, you will be walking on this trail and there will be only 1 food joint on the way.