Biking the Mexican Countryside (Navigator OTS) - Opinions?

[JandBR_PHX]

Wife and I are taking our first cruise to Mexican Riviera on RCI Navigator of the Seas in mid-May.  We like bicycling, but we're nearly 60 y.o., and aren't mountain bike shredders by any stretch of the imagination.  Has anybody done RCI's "Biking the Mexican Countryside" excursion?  We'd just like to get an idea of the distance, terrain, climbs, etc.  Thanks!

[ATSEAMYLIFE]

I'm not sure what port and can only speak to Ensenada area.  As for elevations I wouldn't see a problem as there's not much in the way of high hill climbs.  My concern would be the roads they are taking you on.  Around our area there's not much (if any) shoulder and potholes are the norm in most places.  We don't see many bicycle riders except during the Rosarito to Ensenada ride.  

[JandBR_PHX]

Ooops, I neglected to mention this is Puerto Vallarta.