I haved forgotten how many times I have come tovisited Dabie mountain.

It is located aton the borders of Anhui, Henan and Hubei provinces, and it is between the Huai river and the Yangtze river.

It coverstretches across 380 kilometers long from east to west and 180 kilometers long from south to north.

Its average altitude is 500 to 800 meters, as well as 1500 meters in the main hills area.ltitude ranges between 500 and 1777 meters, with the highest peak being Baimajian.

Its highest peak is Baimajian, 1777 meters.

There are many beautiful scenic spots in Dabie mountain.

The most famous one is Tiantangzhai, and its whose highest peak is 1729 meters, and covers with an area of 172 square kilometers.

I have forgotten how many times I have come tobeen to the Dabie mMountains.

"Dabie Mountain" would refer to a single mountain, like Tianmen Mountain. A range of mountains is usually called "the X Mountains" or "the Xs". For example, some English names of different mountain ranges around the world are the Rocky Mountains, the Himalyas, and the Alps. The pattern English Wikipedia uses for 大别山 is the Dabie Mountains, not the Dabies, so that is what I suggest.

A more colloquial way to phrase this is "I've lost track of how many times I've been to the Dabie Mountains" or "I can't count how many times I've been to the Dabie Mountains". Both mean that you have been there many, many times.

It is located atlong the border ofthat Anhui, province shares with Henan and Hubei provinces, and it is between the Huai river and the Yangtze river.

"at", "on", and "along" all are okay. "at" refers to a point, so it is a little weird to use for something that covers a large area like a mountain range, but still okay.

It covers an area 380 kilometers long from east to west and 180 kilometers long from south to north.

Its aveMost of the mountain range altitude isis between 500 to 800 meters, as well as in altitude, with peaks rising to over 1500 meters in the main hills area.

Using "average" when you are talking about geography but don't mean an actual mathematical average, just "typical, or normal", is a little confusing.

Its highest peak is Baimajian, at 1777 meters.

The most famous one is Tiantangzhai, and i. Its highest peak is 1729 meters, and it covers an area of 172 square kilometers.

If you really want this all in one sentence, I would try:

"The most famous one is Tiantangzhai, which has its highest peak at 1729 meters and covers an area of 172 square kilometers."