Here are some Flagstaff biking trails:

Little Bear Trail
This smooth one-way track is chock full of great views and nature. 

• Distance: 8 miles 
• Average Time: 1.5 hours 
• Elevation Gain: 1,550 feet 
• Difficulty: Moderate 
• Trail Type: Loop 
• Trailhead: Take US Highway 89 to Elden Spring Road and turn left, after 3.5 miles there will be a parking lot on the right side; the trailhead is here.

Mt. Elden Trail
This long trail is great if you’re looking for a challenge with a bird’s eye view of the town. 

• Distance: 14.5 miles 
• Average Time of Ride: 3 hours 
• Elevation Gain: 1,500 feet 
• Difficulty: Hard 
• Trail Type: Loop 
• Trailhead: The trail is just off of a fork in the road after Schutlz Pass Road. Stay left at the fork and continue on. Parking is on the right.

Flagstaff Urban Trail System
If you’re looking for a trail that will keep you in town and allow you to stop periodically for a cup of coffee or a snack this trail is the one for you. 

• Distance: 50 miles 
• Average Time of Ride: varies by how long you stay on the trail 
• Elevation gain: None 
• Difficulty: Easy 
• Trail Type: Walking/biking trail 
• Trailhead: Trailheads for the Flagstaff Urban Trail System are located all over town.

Dry Lakes Trail
This short woodsy trail is close to town. 

• Distance: .8 mile 
• Average Time of Ride: 1.5 
• Elevation gain: 35 feet 
• Difficulty: Easy 
• Trail Type: out and back 
• Trailhead: The trailhead is at Flag Ranch Road and Woody Mountain Road

I am looking for a biking guide.

There are plenty of bike shops in town. One shop that offers bikes, rentals, repair service and group biking trips is Absolute Bikes.