DUDES....this ain't funny....I know this place....I've being there 4 times already....its a national park, good thing you didn't got caught...
Anyhow...yes I'm willing to go, or we can get the trip together soon...the only thing is that we need to be very very carefull....specially when coming down...you might run into a horse or a person going up....
Well...is not that there is a ranger waiting for you right after that berm behind the trees....but there are some walks that the rangers do thru the trails sometimes...and why you ask...because is a National Park, is by law forbidden to ride bikes or any other vehicle (w/wo engines)...you are only allow to walk on the trails in any National park...
Nevertheless...this is a dream of many people here in Costa Rica that knows this place...or at least have tried to go there...personally I have tried twice with no luck, as the rangers noticed my presence and did the patrol walks...
San Jose, Costa Rica 
Anyhow...yes I'm willing to go, or we can get the trip together soon...the only thing is that we need to be very very carefull....specially when coming down...you might run into a horse or a person going up....