Wonderful route (all paved). 5 km to warm-up then there is short steep road to go up; this route is forbidden to cars, with lovely view of lake and wineyards (better don't do saturday/sunday afternoon because there are many people walking the way). At km 8 starts climb to Twannberg (4km quite steep). Next real climb is at km 27, when you sudden turn to right (direction Enges): this is really nice climb in the forest, 1km long and more than 10% (you need good legs). At the end of forest, turn right again into cantonal road where climb continues at 7-8%. Next climb starts at km 34 (La Combe du Sapin) till km 36. Then long downhill and again turn right to Twannberg (km 44) and it starts lovely and funny part of the road, it's up&down along a narrow road, forbidden to cars. At the end of the climb you need to pass a gate, carrying your bike for few meters. Then fast downhill back to Biel/Bienne.