Just in case, I am not saying the women's 4 field should not be combined with juniors, rather than it should not be a free option for the parents of those juniors. Have them pay to secure a spot. I just put some of the numbers from the Chi Cross Cup women's 4 field for your reference (the combined field with juniors is 100):

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What I would really like to see is the women's 1/2/3 back to back with the men's 1/2/3 race, highlighting both races in the series. Right now the women's 1/2/3 happens before the cat 3 and women's 4 races.