Here is what is the frecuency asking question when you are in La Fortuna or in your Arenal Volcano Hotel...
Arenal Volcano area as being among Costa Rica's most beautiful destinations. This area is dotted with scenic hillsides and volcanoes, including the amazing Arenal Volcano  which is one of the most active Volcano in the world. La Fortuna town is the closest town to the imposing Arenal Volcano, which erupts every five to ten minutes, Arenal Volcano is a constant reminder that Mother Nature is still hard at work and came roaring back to life in 1968 killing over 80 locals.
The area surrondiing Lake Arenal is beatiful and peaceful. A visit here gives you a taste of rural Costa Rica. Rolling hills and virging forest flank Lake Arenal, the largest lake in Costa Rica. The perfect cone of Arenal volcano lies just beyond the eastern end of the lake, while the small rural town of Tilaran and Nuevo Arenal anchor the western end. The volcano´s barren slopes are a stunning sight from here, especially when reflected in the waters of the lake.
From December through April, strong and steady winds buffet the western end of the lake. Locals used to curse the these winds. Today they draw hoards of avid sailboarders and kitesurfers. Lake Arenal´s combination of warm, fresh water, steady blows, and spectacular scenary, have made this spot a mecca for practitioners of these water sports.
Although the towns of Tilaran and Nuevo Arenal are little more than quiet rural communities, Hotels and Tours have sprung up along the shores of the lake. If you prefer to visit during less windy months, you may enjoy simply hanging out by the Lake Arenal hiking the nearby forests, and catching glimpses of Arenal Volcano.
Leaving from the Caribbean of Costa Rica you can avoid going through San Jose. After passing Guápiles, go about 15 Km and you will find the intersection of Rio Frio
Lake Arenal is located in Costa Rica next to the Arenal volcano National Park. Lake Arenal sits among the hills of Guanacaste. Lake Arenal is a picture-perfect, man made lake with an area of 33 square miles; the largest lake in Costa Rica. It is surrounded by rolling hills, partly pastured and partly forested.