in a 4x4 iveco.
last fuel / water / services / food before you arrive in Humaita was here :
S3 49.270 W60 21.293 small settlement called CASTANHO
dirt started here :
S4 01.840 W60 36.799
good 'blacktop' road starts again here :
S7 16.566 W63 09.756
from this point to Humaita fuel is approx 60kms.
the section of dirt was 473kms with some sections of blacktop.
many MANY bridges (we counted over 250)
some were unpassable but always found route around.
the 473kms has no services available. do not believe the maps !!! or the rumours.
You need to assume enough fuel to cover the 473 + the last 60.
The issue of course is how wet it is.
Rainy season commences anytime from mid november and the road is underwater and height of rainy season.
rainy season 'begins' to end around June / July
we chose November for two reasons;
firstly it meant our time in Venezuela was good for visiting 'Salto de Angel'
second - we figured the very beginning of rainy season the road and bridges should be in best condition.
It took us 6 days, Manaus to Humaita.
We saw 5 vehicles along dirt sections, all locals in light wieght pickups or small cars.
it's a fun route !
my pages have downloadable garmin database of this section (and others of course), it gives a blow by blow record using waypoints for all key points as well as listing our track.
www.philflanagan.com
then navigate to 'americas'
and on to 'coming this way'
good luck, have fun !
Phil.