Sacramento Northern Bikeway Trail is a 10.1 mile moderately trafficked point-to-point trail located near Sacramento, CA that features a river and is good for all skill levels. The trail offers a number of activity options and is accessible year-round. Dogs are also able to use this trail but must be kept on leash.
dogs on leash
This is probably the straightest, and most level, bike trail in the Sacramento area. It follows the old Sacramento Northern Electric Railroad bed from downtown Sacramento, through the farming community of Rio Linda, and ends at the junction of Rio Linda Blvd and Elverta Rd; some 10 miles to the North.
The trail leads through some of the more economically depressed areas of Sacramento, but I've always found it a good solo bike ride. If your not so adventurous, you might want to share the experience with a friend.