My wife and I may be doing the metric.....she's a semi-newbie but I think she could finish it ....or come close.....we're planning on an 11-12mph pace....I've done the Seagull many times but missed last year due to a leg injury.... since then I've gained a few pounds back and have been a bit lethargic about the bike.....less than 1000 miles this year.....and I've been laid off since Feb.! So we'll see.....I've got till midnite tonight to sign us up