I read many posts about going 50 miles, 100 miles, more. Mind boggling to me, the truth.

My goal is to go 25 miles. If I can get there, I'll be proud of myself. I only started biking again 1 month ago. The first rides were 2 - 3 miles. Then I made it to 5. I can go 10 now but I'm worn out by 10 miles. Well, at least today I am. We went on "C" terrain and, for me, we were trucking. That means about 13 - 14 miles on flats. I did get up to 20 on a downhill. Woowoooo!!!! lol

For those who were ever in my boat - starting again in their mid 50s - how long did it take? Why is it taking me so long? Am I being impatient? My thought was if I did this slowly, I'd have less of a chance of hurting myself. And I wanted to keep it fun. I'm just surprised that I still have to work to get through 10 miles. And I do. My breathing is okay but my muscles are tired after 10 miles. Is this normal? Should I be pushing harder? Or just keep adding a mile a week on my daily loop till I get to where I want to go?