We have been hiking with John and his guides for over 7 years now. We have gotten quite familiar with the park and despite being able to hike all over on our own, we always choose to hike with John and his guides. I can't say enough about the entire Yexplore team...they are all exceptional from Catherine and her supreme efficiency, kindness and thoroughness to John and next level professionalism, passion for Yosemite, as an environmentalist, photographer and expertise. I always learn something, am challenged, inspired and blown away. We brought a friend of ours and hiked down and up to the valley floor with guide Carly Lucas, then hiked sentinel to taft point....one of the most spectacular views in the park. Carly was amazing...so professional, well informed, encouraging to our friend as it was his first time and kept checking in on him to make sure he was doing okay. We enjoyed the morning with her and hiked about 11 - 12 miles..it was just incredible.