CREATE TABLE table_21763 ("Number" FLOAT, "Name" CLOB, "Kilometer" FLOAT, "Location" CLOB, "Length  ( in m ) " FLOAT, "Average climb  ( % ) " FLOAT)

The Eyserweg race was which race #?
SELECT MAX("Number") FROM table_21763 WHERE "Name" = 'Eyserweg'
SELECT MAX("Number") FROM "table_21763" WHERE "Name" = 'Eyserweg'