I believe there is a big shortage on climb maps at the moment, I suggest these good maps:
xc_dtt_anthologie3 - Basically
the map, the big one.
http://css.gamebanana.com/maps/52335xc_rocks_hard - Not very hard on gmod, relatively short.
http://css.gamebanana.com/maps/169638xc_natureblock - Relatively short and easy map, fun to nosave.
http://css.gamebanana.com/maps/147440xc_sanctuary2 - Medium level map, must add classic.
http://css.gamebanana.com/maps/108433xc_nature - Also quite a short map.
http://css.gamebanana.com/maps/104505xc_peak - Fun classic map, might miss some textures.
http://css.gamebanana.com/maps/90319xc_dtt_hope - Also a classic, quite long but easy to nosave, doesn't use custom textures.
http://css.gamebanana.com/maps/69217xc_cliffez - Fun map, hard to nosave but definitely possible.
http://css.gamebanana.com/maps/58488xc_unknownposition - Short adventure map, factory style.
http://css.gamebanana.com/maps/47323xc_toonrun3 - Big cartoon adventure, very fun.
http://css.gamebanana.com/maps/30889xc_galaxy - Climbing in space, very exciting to play without saving.
http://css.gamebanana.com/maps/17518All of these maps are very high quality, I have personal experience on every one of them and would recommend adding these to the server.