I am wondering if it is possible to hike many trails at Arenal without a guide, as one does at US parks such as Rocky Mountain National Park. Are the trails well-marked? How do you get to the trailheads? If you don't have a car, is it possible to walk to the trails from town or how much does it cost from La Fortuna taxi ride to the trails?
I realize there are a lot of guided hiking tours (most seem to be $40 and up) but I wonder if one could do this more cheaply and enjoyably on one's own. If hiking alone is not feasible, can anyone recommend a less expensive hiking tour?