This video talks about the the spiritual significance of the Grampians, famous hikes to take, routes for cars, 4x4 tracks and information about the wildlife in the area. this video is somewhat useful with information that's mostly reliable. since this is a company video there is a possibility it is bias.
This website talks about practically everything there is to know about the Grampians. it is the best website for information by far however with a downside. the downside is that it is a publicly editable website so information on the website might not be as accurate as it may seem. also useful this website is very unreliable.
The website displays a lot of information about the Grampians such as where to go for information, hotpots, the different parts of the Grampians, must visit locations, camping information, camping fees, good walks/hikes to go on. This site is very useful because of the amount of information and ease of navigation. It is very reliable since it is a government site.
this website talks about hiking tracks, walks, weather conditions, what the biomes in Australia are like and how to reduce waste when going to the Grampians or other hotspots in Australia. this website is somewhat useful since there is little information but the information given is deep. the source is reliable because it is a published book.