Ugh. I'm stuck! I cannot get to that 26 minute marker. 20 minutes is still tough, so after that I am just done. I have decided to "quit" C25K and go it alone from here on out. Today I ran 20 minutes straight and then switched to distance. After the 20 minutes, I walked to complete the lap I was on and then walked a 1/4 mile on top of that. Then I ran for 1/2 mile and then walked for 10 minutes. My hope is that doing that exact run all week will make the 20 minutes easier. Depending on how I am feeling I might try for 26 next week or maybe just do a 21 minute run then the 1/2 mile and work up the 30 minutes slowly.
The good thing is that I keep going back. I have not run so many days in my life!
Or try Jeff Galloway's method. His training plans work on doing intervals. It is just a matter of finding what ratio works for you. Maybe start with a 1:1. So run one minute, walk one minute. If you google Jeff Galloway, he has a conditioning plan that lots of Disney runners have used to get ready for his half marathon plan. I think he also has a 5K and 10K plan. It might help you break that 20 min mark and go further. Good luck, just keep working at it. You WILL get there!