In 2009 I purchased my first road bike. 2009 was also the first year I specifically trained for a cycling event. My goal was to complete 100 miles in the Apple Cider Century. As you can see, I came a little short of my goal distance and only finished about 71 miles of the event. However, this was the longest I have ever bicycled in one day. 
Here is the information on my training for this event:
Month
Days
Miles
Hours
April 2009
1
5
1
May 2009
5
68
6
June 2009
14
214
15
July 2009
16
237
22
August 2009
18
319
27
September 2009
2
89
6
Total
56
932
77
Keeping good records of your training is great so that you can take a look back and see how you might improve. One item that sticks out is that I only trained for 2 days in September. This was a result of becoming ill. Was it possible that I was over-trained? Another issue was that I only had 3-4 months of significant time on the bike for training. It’s possible that my goal distance was too high for the time (or lack there of) that I had.