The hilltops and mountains surrounding Athens are there for you to enjoy. The closest and quickest route for amateurs and novices (with a spectacular view of the city) is the 2.5 km (or 1.5 mile) track that encircles Lycabettus Hill.
Located in the historical Marathon locale, about 40 km (25 miles) from the city, is Schinias-Marathonas National Forest.