Trail 11 (Blue dot) is the access trail leading to the beautiful Pisoiul (Cofu) Waterfall, which springs straight from the rock, splitting into several streams along a charming carpet of moss. The entire trail is rather demanding, a total elevation difference of over 800 m. It is an approximately 3½-4-hour hike. The trail is also (partially) accessible by mountain bike.
The starting point is at km 11 into trail 10 (blue cross), which climbs from Bistra Muresului along Bistra Valley. Locally, Cofu Waterfall is also known as Chisoiul Vacii. Therefore, this is the name you should use should you opt to ask the locals. As you climb along the valley, you reach a forking where the blue dot trail goes onto the Cofu forest road (signpost toward Cofu Meadow). The road continues toward the ridges and within approximately 1.5 hours, the waterfall can be heard and admired to the right.
Cofu Waterfall is a distinctive natural monument, the water springing straight from the rock, from below a tree root, forming an impressive waterfall, which splits into several streams, sliding along the black rock and making its way through a green carpet of moss. The spring of the waterfall can also be accessed via a path climbing along the stream on the left.
Once at the end of the forest road, you climb for a little over 1 km along the path through the forest and you get to the intersection with trail 10 (blue cross), which comes in along Valea de Mijloc Valley. The trails share their routes for another 10 minutes, between small fir trees, up to Cofu Meadow, which provides a lookout point over Bistriciorul Peak. From here, you can either descend toward Colibita Lake (trail 8 – yellow triangle) or tackle the ridge trail heading toward Bistriciorul Peak (trail 9 – yellow stripe).