There is no "official" weight defined as Clydesdale. It's whatever each event organizer chooses it to be. Usually it is 200 lbs for men. It's more variable for women but around 145 or 150. Height does not enter the equation, it is striclty a weight class, so short heavy guys like me are at a distinct disadvantage. There are seldom many age groups either since Clydes comprise a rather small proportion of the running community. One 15K that I do every year has open and masters divisions only. Now that I'm over 60 competing against 40 year olds is another huge disadvantage.

Here's the Clydesdale results from that 15K as an example.

http://www.hmrrc.com/View/PDFs/Results/08stock_clyde.htm

actually that page gives you your projected time if you 25 years old and some random "perfect" weight

I`m 158 lbs on a good day - but my body fat in in the teens - I`m underfat  -  While I don`t get on the podium I`m usually in the top 10% of my age group and we have  2 - 300 runners in each age group here  - If I got lighter it would be at the expense of muscle mass - I`m not sure that would translate to better performance.

Yes losing fat has a dramitic effect - I can vouch for that dropping 20lbs at the start of this year dropped over 1 min per mile off my half marathon pace - i`m now doing long training runs at what used to be my 4 mile race pace - but weight alone does not tell the full story of an athletes condition

OK, if 185-205 puts one in Clydesdale category, I need to know, what comes after Clydesdale?  Jogging elephant? Land Whale? 

I'm 6'1" 280 lbs. Just started C25k yesterday. Easy, slow, short. That is my mantra.

On top of being fat, I also have Psoriatic Arthritis, so talking it slow to see how my recoveries go.

But I feel safe in saying, if there is a minimum wieght for this forum, I qualify in spades.

Hey Forrest , thanks for the encouraging words.  I am indeed taking it slow, doing it with my wife who is a bit further behind than me too, so together we are aiming in a year to be able to take a  nice 2-3 mile trail run together with our kids.  That is the goal for now.

Only my second workout yesterday, little over 1.25 miles in 60/90 run walk intervals. My calves were really tight and I was nervous until I remembered I had just spent two days on a stepladder plastering. 

But we're started, like you said. and that is something 

Hey wideguy, great to see you starting out!! I never ran in my adult life (or as a child either I guess) but last year I decided to start working out and getting serious about my weight.  I was 6'5" and right around 300lbs when I started.  After a couple months of working out (elliptical training and weights) I lost about 20 lbs and decided to try jogging on a treadmill...couldn't hardly make it 1/4 mile at 4.5mph!@!   Now...a year later, I'm down to 248lbs and running 5miles 3x a week training for my first 10k next month.  If I can do it, you can too!!! Take it really SLOW and easy until your joints adjust and your muscles strengthen up...the only time I had alot of hip pain was when I got cocky and tried to push too far too fast...so keep it slow and easy and you will do great!!!