* Starting point: Where are you beginning your count? Are you starting from the street, a nearby building, or a specific point on campus?
* Route taken: There are likely multiple pathways and routes to reach Thirkield Hall. Each route would have a different number of steps.
* Step size: People's strides vary in length.
To get an approximation, you'd need to physically walk the route and count the steps yourself, specifying your starting point and route.