Thank you for sharing! Unfortunately, it will be difficult to verify this is a fossil without some more information and photos. Since it is a landscape boulder, it will likely be very hard or impossible to determine where the rock originated from. Knowing where it came from would be extremely important for determining the age and what potential organisms would have been around. It is also helpful to provide something for scale in the photos. Even when you provide dimensions in the text, it is much easier to conceive the overall size if there is some kind of scale for reference in the photo(s).
While the impressions do have a resemblance to a dinosaur track, my gut feeling is that it is not what it is. Most likely, there was another type of rock embedded into the larger boulder and what we are seeing is that secondary rock eroding out.
I’m sorry I couldn’t be of more help, but I hope you will continue to share your finds with us!