Coroico new highway is open to public use, It's a very scenic road and the best way to appreciate it is by using the Hotel Esmeralda express van or a local taxi, which does the route in only two hours. The best value in hotels is Hotel Sol Y luna. It is an amazing place with unspoiled nature and huge rooms (cabanas)with kitchen, large size bedrooms, private bathroom and even your own BBQ right outside your room. The views in Coroico are breathtaking and weather is semitropical.
From La Paz to Coroico you can also take the Most Dangerous Road in the World, the former main road, which is an excellent day trip on a bicycle. The most famous of those is '''Gravity Assisted Mountain Biking''' [http://www.gravitybolivia.com/], though there are very cheap options to be found in the Sagarnaga street in La Paz. Another option is to contact the small Coroico agency [http://www.mtbcoroico.co.cc].
There are also several two day walks which lead you to Coroico. See 'Do' section.
There is some good '''hiking''' in the surrounding. There are several one day hikes, which include going for a swim in wild and clear rivers, seeing local agriculture (coca, banana, coffee, citrus fruits), old Casas de Hacienda (the houses of the former landowners), virgin forests and Afro-Bolivian communities. A good website about excursions in the Coroico area is [http://www.coroi.co.cc www.COROI.CO.cc].
Noteworthy is a new '''community-run eco-tourism project, Kori Huayku'''[http://www.KoriHuayku.co.cc]. Local guides offer a full day excursion in a most beautiful unspoilt valley, featuring great cloud forest, Cock of the Rock and even chance to see monkeys! The valley hides a forgotten Inca Trail, carved into the sheer canyon walls. Impressive, and for the good of poor local communities.
Two interesting '''two or three day hikes''' go from La Cumbre (the highest point between La Paz and Coroico, 4700m) to Coroico (1700m). The most famous is the old Inca Road "El Choro", which was the most important connection between the Yungas and La Paz until the 1930s. The other one is commonly called "Eco-via". It is a road carved in the mountains, with the idea of having a train connection. It never did function, but as a train needs relatively flat terrain, it's a much more accessible option for people not used to walking. It can be done in two or three days, but come well prepared: the first two days you will not encounter any villages.
CXC [http://www.mtbcoroico.co.cc] offers '''mountain bike''' tours around Coroico for beginners to experts. Lonely Planet called them "a bit disorganized, but very friendly".
Most people just come to '''chill out''' at the pool, and at night go eat in one of the excellent restaurants.
You can find '''guides''' in the Tourist Information Office on the Plaza, or you can ask your hotel to recommend one.
There are minibuses to La Paz from 3am to 5.30pm. These take the safe new road, but are a bit cramped. 15-18 Bs.
A private taxi to La Pax should cost around 300-350 Bs.
There are daily busses all the way to Rurrenabaque (at least 15 hours), leaving around noon.