Hi Marcia,
I recently completed a 1/2 marathon this past weekend. I think everyone is different in terms of what types of weight training they do and to what extent. Some runners do very little weight work because they feel that it interferes with their performance. I personally like to go pretty intense as I feel that it makes me a stronger runner. So basically I do my strength training regardless of if I'm training for a particular race or not.
I think the best thing for you to do early on in your training is determine if you feel that the weight training is affecting your performance. If you determine that to be the case then I would modify my rotation to accommodate.
~Marietta
FITXME