Under profile Cycling it asks for cycling classification number what is that?
These are race categories. * Recreational means an un-rated rider, someone who doesn't race. * Category 5 means new racer. All licensed road cyclists start as cat 5. * Category 4 means you've completed 10 mass-start races. * Category 3 means you earned 20-30 points as a cat-4 racer. * Category 2 means you earned 30-40 points as a Cat-3 racer. * Category 1 means you earned 35-50 poings as a Cat-2 racer.
Cat-1 upgrades require the involvement of the regional race coordinator, but lower levels can be done locally.
There are several ways to earn points: * Attending a USA Cycling education clinics * Completing a race in the front pack * Finishing in the top 10 of a race.
As for "Open Category", I'm not really sure. It looks like it's a fuzzy term for elite racers, such as cat 2,1,pro together. It may include Cat 3 racers that were fit enough to compete with them, but didn't have the points to upgrade yet.
Other groups and countries may have minor variances to this, but generally, the numbered categories are roughly equivalent.