QCF Huts - Losail Circuit Service Roads
Monday Evening Duathlons
Google maps Location

The Qatar Cycling Federation huts are located at the far side of Losail Circuit on a short 1.5km stretch of road, with roundabouts at either end. This makes it a perfect location for cycling as it's very quiet. As a result, TriClub holds it's duathlons there and Qatar Chain Reaction organise Criterium races there, both typically on a Monday night. 
QCF HutsBike Route
There are multiple options here for shorter or longer loops of the area starting from the QCF huts, although recent diversion of the Al Khor highway have created a higher volume of traffic.

The club duathlon uses a 2.6km loop using 2 roundabouts - 8 laps is 20.6km

Another option is a 4km "L-shaped' loop using 2 roundabouts and a hard u-turn outside the circuit entrance.Duathlon 4km Bike