Gran Mountain is a song from the NES port of Rygar. It was composed by Michiharu Hasuya and only heard in the US and European versions of the game. Like Sueru Mountain, the song has an adventurous feel with a soaring lead.
The song only uses the two square wave channels of the NES APU with the lead on channel 2 and the backup on channel 1. This was most likely not the choice of the composer, but rather a poorly-written audio driver which couldn't handle sound effect interruptions, so all sound effects were relegated to the noise and triangle channels.
In the game, the song is played at Gran Mountain and Rolsa. It is track 2 in the NSF file.