The 15.8 km long trail connects two camping resorts located on the Raša bay: the campsite Sveta Marina and the campsite Tunarica. A relatively demanding trail starts from the campsite Sveta Marina, situated on a small peninsula surrounded by olive groves. From the sea level, the trail leads uphill towards the village of Kosi and continues to the top of the hill Oštri at a height of 531 m from where you can enjoy breathtaking views of Sveti Marina, the Adriatic Sea and the islands of Cres and Lošinj. The trail continues on to the macadam road and joins with the beautiful forest path leading to the Veliko Kolo, a spacious meadow with a natural feeding ground of wild animals. The trail returns shortly and descends towards the sea, passing near the church of St. John from 13^th – 14^th century. It continues further in the direction of the quarry and the Koromačno bay, where the settlement of Koromačno is situated, today it’s known for the cement plant due to which the population settled in these areas by the sea. The trail leads us further through the woods and returns circularly to the campsite of Tunarica which is located along the little fishing village of the same name once famous for catching tuna.