check out KansaiScene.com for monthly event . you can get the magazine for free in any Kinokuniya, book1st , Junkudo bookstore.
Also there is an information counter in Hankyu just outside the central exit/entrance of Hankyu Umdeda station, another information counter is located just outside Osaka JR station ( i forgot the exit ).
Another way to try the outdoors of Kansai is to get in touch with International Outdoor Club Kansai:
IOC Kansai | International Outdoor Club Kansai