Uses the mountains to study where one can find oneself on the map. The valley was surrounded by snow-capped mountains, but mostly in the MacIntosh Hills and Foal Mountains - all indications are that Bridlewood is located in the MacIntosh Hills, probably where the city of Dodge City was located according to the so hopeless “official” map from Hasbro that is simply too small. “The Pony Wild West” (perhaps Mustangia) is probably located west of the Middle Equestria towards the Unicorn Range - something that the IDW comics suggest, and it seems that the IDW maps may have become more significant than expected. These are more spacious than the Hasbro maps which are too bad.
And when it comes to travel time; we have seen time and time again that writers constantly shortened travel time for the sake of the narrative until the illogical. It’s worse in the G4 movie than in the G5 movie. And turning Rainbow Heights into Zephyr Heights doesn’t really solve the travel time dilemma - it only makes it worse.
By using a calculator, it has been shown that one can travel 1,500 km in 50 hours at 30 km / h, and these are ponies that can have greater endurance than horses and humans. It looks like it took two days between Maretime Bay and Zephyr Heights. Then we have to reckon with a radius of at least 1,000 km. We saw Sunny and Izzy galloping rather than walking, and a horse is always faster than a human. I have cycled at 15 km / h in 14 hours, and reached 260 km. Much of the travel time in our world is actually due to the topographical obstacles rather than distance, and that we are “designed” to walk at only 5 to 12 km / h over a long period of time.
Bridlewood can be 200 to 300 km from Maretime Bay, and since Sunny and Hitch will warn the unicorns first, it is thought that there is a direct route from there to Bridlewood. Canterlot / Zephyr Heights maybe 800 to 1,000 km away. It took a whole day to cross the valley between Zephyr Heights and Macintosh Hills, this is more in line with what is known from the G4.