Looking for a 50 mile Bike Training Plan

My guess is that you could use this one and just cut all the distances in half: 

http://www.diablocyclists.com/RiderTips/EasyCenturyTrainingProgram.htm

Here's another:

http://www.adventurecorps.com/way/centtrain2.html

One more. This one may be the best because the training distances are based on a percentage of the ride distance. This particular ride was 120 miles with some killer climbs.

http://www.teamevergreen.org/triple_bypass_filesandsubpages/Training%20Plan_Triple%20Bypass%20General%20TP%20for%20pdf_2007.pdf

Hmm...sorry, I don't know of any canned plans for that distance.   You could look at a Half-Ironman (56 mile bike) plan and ignore the run and take the swim as suggested cross-training days...but even that'd be tricky.  Most are for 16 to 20 weeks and you have about half that. 

Instead, I'd just plan on riding 3-4 days a week, an hour on most days, adding in intervals and hills to keep it interesting.  Then keep pushing your weekend long rides up by 20-30 mins each weekend in August, starting with a 15 miler (or 1hr) ride this weekend.  See where that gets you by Sept, and check back in.  You will want to take a recovery week where you cut back about 20-25% before resuming a build period in early-mid Sept. and then ease off more in the week before your long ride. 

As it is, you could probably ride 50 right now if you had to, but you have the time to get your butt and quads really ready for it, so why not put in some periodized training?

Enjoy your training, -Sunny

You can ride 22-24 miles now, I bet if you wanted you could go ride 50 tomorrow..maybe quite sore the next day.

My suggestion is simple, just ride 5 miles more each week for your long ride...if that brings you up to 50 great if not add 6 or 7 miles a week. Do atleast 3 rides a week...build the two other ones up to 1.5 hours so you are doing 22-24 2x a week plus the longer ride.

I ride one long ride a week plus two different types of intervals a week. I love to ride and ride a lot. I went from a long ride of 3 hours to 5.5 hours fine. The 10% rule everyone talks about applies more to running than cycling.

Sunny has some great information....we both think you can do it tomorrow 

Have fun riding rocks!