1

Outdated info from 1983. Great trip. Did it in july. Not sure how the roadwork is doing in that area. If there are roads to use in this area, there won´t be much going on with boats.

2

Hi how was your trip? In couple days I will go to Puerto villarroel to take a boat to Trinidad. But I didn't find out any travel agency, who is offering some tours. I would be happy if you share your experience.
Gr Ati

3

Re # 3:
There are no tour operators or travel agencies offering that sort of travel.
You have to arrange everything yourself.
When going by boat on your own, you have to speak Spanish fluently !

See also the thread Travelling by boat in the Amazon, Jun 22, 2012.

If you succeed in doing a boat trip, please come back here and tell about your experiences.

4

Akarcayati (in # 3), if you are in Santa Cruz (de la Sierra), I suggest that you contact Ruta Verde Tour Operator / Travel Agency: rutaverdebolivia.com
I guess that they can confirm that going by boat to or from Trinidad is very difficult or impossible.

But Ruta Verde sells tours with the "Reina de Enin" riverboat / 'flotel'.
Ruta Verde also sells a "Motor Boat Expedition" on the Ibare River from Puerto Almacén near Trinidad: rutaverdebolivia.com/Motor-Boat-Expedition.php

5

Re # Erik07

thank you very much for your reply. i am still in Samaipata ,its very nice place :) i am still looking for more infos about the trip. one of mine friends told me also that i can find a boat from puerto villarroel to trinidad..i contacted the agency already by email. one more thing , i really dont speak spanish :( you think it is a big problem in boat ?
as soon as possible i getthe infos i will share with you guys..

6

Yes, Samaipata and El Fuerte de Samaipata (Fort / Fortress of Samaipata) are nice places.
You can read my review at lonelyplanet.com/bolivia/the-southeast/samaipata/sights/archaeology/el-fuerte

Back to your boat tour:
Without speaking / understanding (some) Spanish (or travelling with someone who does) you will not be able to negotiate and arrange with the skipper and crew of the boat, and it would be difficult to handle situations that can crop up on the way. Remember that the voyage will take several days.
You will not be able to understand (some of) what the crew members are talking about among themselves, and you will not know what is happening around you.

Also be aware that the conditions for sleeping (on the boat or on the riverbank), eating etc. will be utmost basic / primitive. Along the river you will pass stretches more or less outside the civilization and without mobile / cell phone coverage.

So unless you are a very experienced and adventurous traveller I would say:
Stick mainly to the beaten Gringo trail. Do not go by boat as the only foreigner / tourist.
If you want to go by boat, join a group, take a tour.

For instance one of the river tours offered by Ruta Verde, or check out for instance Deep Rainforest and Andean Epics. Deep Rainforest offers inter alia an "Inner tube Rafting", 5 days/4 nights, downstream the rivers to Rurrenabaque.

Also Etno Ecotourism Mashaquipe has a tour / programme called "The Gates of Madidi" / "Las Puertas del Madidi" going on the Kaka and Beni rivers from Guanay to Rurrenabaque.