Standard Tri 3 weeks before a Half Ironman

I hope so, because I am doing the same thing! I have found that I recover fairly quickly from an Oly and really only need about 3 days to get back to normal. Plus I will not go at 100% effort which will help

If you are going to race the oly, than go all out. Personally I see zero point in not racing as hard as you can. Recovery from an oly distance race is quick. Depending on your training scheduled & race day you could pick up you training without missing any workouts. My schedule gives me one off day per week. Which to me means zero training. Well, unless you count playing whatever pool game that kids feel like playing that day. Anyway, if the oly is on Sat, then Sun is my off day & Mon picks right back up with the training schedule. I agree that the week after the race should be "peak" training, or whatever terminology your plan utilizes.

Either go with GMAN's suggestion or do the Sprint as a substitute workout. I might be asking the obvious, but is there no way you can do an Olympic 4, 5, or even 6 weeks ahead of your half?

Thanks 3 weeks out is the only date that suit me to getting in a race.

i could always do a Bike / Brick Session of 40k and 10k run at race pace 4 to 5 weeks out don't know would that be the same..

I think it is one of those things that is very individual and you need to know your body. I know a lot of people who could do this. Although this would not be a good idea for me as my legs take a long time to recover after racing. If it was me I would probably sign up for the aqua bike.

my location they dont have any aqua bike races.. its a shame i love swimming as it is my strongest

I did this last year with no problems. Well except there was an issue of a guy swimming into oncoming traffic and hit me head on.

I did the Oly for two reason: 1 I'd never raced that distance before and wanted to. 2. it was at the same location my HIM was and I wanted to test the roads.

It worked for me.