I like biking

I biked on Monday June 3rd from the Blue Bridge (Pioneer Memorial Bridge) to Share-House Coffee House and back. Longest bike ride I have ever done continuously. It's about 11.8 to 12.0 Miles one way. It was a challenge with a mountain bike. Yet, I should bike the Columbia Park Trail  next time and do it all.

The next trip I want to do is travel the whole trail next to the river which would be about 14.8 to 15.0 Miles one way. I want that to be my goal for the year without being winded.

What can I do to make it possible and have more energy at the end?
Examples:
 - Different bike type?
 - learn to breathe better?

Please leave comment.