u/Bjoyca

Hey there guys.
My parents are visiting and I would want then to experience the national parks, see some lakes and everything that the trails have to offer.
The problem is my dad is 80 and not active at all.
So my Idea was to rent an UTV and get on exploring.
Where can I find some UTV / wich trails would you guys recommend ?or parks where the walking distance to a lake would be minimal?
Any recommendations.
Thanks in advance.