Is the highest mountain in Tamriel High Hrothgar or Red Mountain?

Fairly certain the Throat is repeatedly stated as being Tamriels largest mountain...but Red Mountain is technically a volcano. I'd be surprised if it actually was taller all considering, especially after its massive eruption during the Red Year. I'd wager its Tamriels largest volcano however.

Ok, so the Throat of the World is given that honor. I'd just like this clarified because this statement is causing me uncertainty:

"This is the highest mountain in Skyrim, and the highest in Tamriel aside from Vvardenfell in Morrowind."

That's from PGE, 1ed.