Seven. Sunny, hot but comfortable with low humidity, didn't really notice the wind with all the scenery. Mixed surface ride from Tusayan out to the end of the paved Canyon Rim road @ Hermit's Rest. Rode the Seven with the gravel allrounder tires as there was some rough pavement and just a bit of gravel. Lots of climbing (+2,100 ft.), all at high altitude between 6,600 and 7,100 feet elevation. The Park Service was kind enough to put in a greenbelt paved trail from the park down to Tusayan, which was accessible via a mile long gravel road from the hotel and the trail extends through most of the Grand Canyon Village. The road out to Hermit's Rest was in great condition with a small shoulder but almost no traffic except the occasional shuttle bus but they give cyclists a wide berth. Kris and I spent the morning and early afternoon hiking and sight seeing so I got a late start mid-afternoon in the heat of the day - which seems fine after the heat we had the last few weeks in Tucson. A great ride with breathtaking views of the canyon at several point locations: Maricopa, Powell, Hopi, Mohave, Monument Creek, Pima and of course Hermit's Rest. I saw lots of wildlife including the usual hawks, vultures, ground critters but also mule deer, elk, mules and even some wild horses. Most of the greenbelt trail is through the Kaibab National Forest. As a bonus, the last 2-3 miles of the rim trail is paved and open to bicycles to Hermit's Rest.