Quote Originally Posted by TrekTheKaty View Post
Most training programs recommend increasing by 10% each week, so 5/week sounds about right. However, a long ride of 60ish is sufficient, so if you've completed a metric, you're there. Anything above that is a bonus.
I have heard this advice, and frankly, I don't believe it is good advice unless you are also riding at least 120 miles per week. Riding 60 miles feels almost nothing like 100 miles, and even my longest training ride of 75 miles felt inadequate compared to the full century. Of course a lot of this will depend on your overall fitness levels and your strength as a rider.

I used Selene Yeager's century training plan from "Every Woman's Guide to Cycling." She recommended not exceeding an increase to your total weekly mileage of more than 10%, which is different from increasing your long ride by only 10%.