Table schema:
CREATE TABLE table_name_23 (first_time_as_hc_climb VARCHAR, height__m_ VARCHAR, most_recent VARCHAR, no_of_times_visited VARCHAR, no_of_hc_climbs VARCHAR)

Question: When was the first HC climb before 2013 with more than 3 times visited, more than 4 HC climbs, and a height of 1669?
SQL: SELECT first_time_as_hc_climb FROM table_name_23 WHERE no_of_times_visited > 3 AND no_of_hc_climbs = 4 AND most_recent < 2013 AND height__m_ = "1669"