There's very little evidence to support it as fact. The stories about Skinwalker Ranch are full of things like alien abductions and shape - shifters, but there's no physical evidence to back these up. Some might point to strange lights in the sky as evidence, but that could be anything from airplanes to natural atmospheric phenomena. The scientific method requires verifiable evidence, and the tales from Skinwalker Ranch simply don't meet that standard, so it's more likely to be fiction.
For the 'fact' side, there are some reports of strange magnetic fields and unusual animal behavior on the ranch. But for the 'fiction' side, most of the evidence is anecdotal. People claim to have seen UFOs or strange creatures, but there's no hard scientific evidence like clear photos or reliable eyewitness testimony that can be independently verified. The stories often seem to change and get more elaborate over time, which is a sign of fictional elements being added.
As for evidence of it being fiction, a lot of the so - called evidence presented is based on personal accounts that can't be objectively measured. For example, claims of seeing ghosts or other supernatural entities lack any scientific basis. On the fact side, the ranch's geographical location might contribute to some odd natural phenomena, but this is often misinterpreted as something supernatural. Overall, the lack of solid, reproducible evidence leans more towards it being fictional.