You want to arrive at the starting line well trained, not overtrained. Run those long runs at a more comfortable pace, and save race pace for other days of the week, or for the marathon itself.
Easy Long Runs Marathon Medic
Long Run Pace: What should mine be?
8 Long Run Variations To Build Endurance
Marathon Training Guide
What Pace Should You Run On Easy Long Runs? - RUN
Running a Marathon: Race Day Success, Patient Education
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Half Marathon Training: 5 Best Long Run Workouts
HOW FAST SHOULD I BE RUNNING? HOW TO TARGET THE RIGHT RUNNING PACE — Rhode Runner Inc.
The long run's role in endurance training - Canadian Running Magazine
How to train for a Half Marathon Part 2: Peaking – HIGH5
Marathon Long Run Training: Get The Long Runs Right
Running A Marathon or Half? Get Fast First
Advanced 1 Marathon Training Program
Hal Higdon on X: Do long runs 30-90 seconds or more slower than race pace. Running long at race pace is self-destructive. Even the Kenyans don't do fast long runs. A survey