My wife and I are up in Whistler, she rock climbs, we hike, I ride.
Last Saturday, I rode the XC trails on my Epic. They are very impressive and the quantity of trails is overwhelming. I had heard many people like the XC in Squamish better, so next summer I will try that XC. If you come up here, though, do not bring a true XC bike for the Whistler XC. My Epic is very short travel and very aggressive, and just beat the crap out of me.
Yesterday, I rode the bike park. If you love MTBs and have not come here for this park, you need to put it on your bucket list. I rented a Spesh Demo 8 for the park. There are more runs to try than you could ever ride in a day. It might take 3-5 days just to try each run out once. At my tender age, there are many runs I would not even try. The harder blue runs are like many black diamond runs I have ridden in other place, then they have black diamond, double black diamond, pro, and even a few out of bounds runs. I looked at a few of them, some look rollable with caution, some have drops or rock slabs that are vicious.
All in all, it was an amazing experience.
I did have a very weird event on the last run. A rider had taken a vicious crash and my guide and I were just seconds after the crash. Three of us jumped into action doing emergency wilderness first aid until the pros got their. I believe the guy will be fine, but he had moved around a lot before we got there, and probably should not have. His son had taken off his helmet, and it was basically a road bike helmet, it was crushed and broken in several spots, but luckily he was appearing to be coherent with both short and long term memory.
Now, I am looking at another MTB that might work for rough XC trails and blue DH....