Uetliberg is really one of my favourite trails in and around Zürich, for the fact that it is easily accessbile with the small train S10 which departs from the main train station at an interval of every 20min. The ride takes about 20min to go up. If you don't want to do much walking, just go to the Uteliberg Kulm, about 15min walk and enjoy the beautiful panorama view. You can climb up the tower for a even better sight. There is a restaurant right at the Kulm. What I usually do is to go for a 2hr walk through the woods, the meadows and the fields in the direction of Felsenegg. I would pass Felsenegg to walk further to Buchenegg and have a delightful 4-course meal at the restaurant Chluspfer for the price of Fr.19.50. It is a restaurant decorated after the children's book: Max and Moritz, a friendly place with pretty good food and reasonably priced. In the summer time there is a dlightful garden. You really got the feeling that you are on vacation, very relaxed under the parasol. From Buchenegg I would walk back to Felsenegg, a 30 min. stroll and take the cable car back to Adliswil. At the train station Adliswil, I can take S4 with intervals of every 20 min, I will be back to Zürich in no time. If you want fresh air, nice view, good food. This is the place for you and the train fare is not too outrageous when compared with other spots in Switzerland. You can visit this place most of the year except in winter when there might be snow.