The bike ride along West Lake Sammamish Parkway is approximately 22 miles (there-and-back); it is a mostly flat course. The Bike Ride has a total ascent of 600.39 feet and has a maximum elevation of 262.47 ft. It should be pretty easy for people with some biking experience. You can start your ride at Idylwood Beach Park. The park can be reached from eastbound SR520, take West Lake Sammamish Parkway NE exit, turn right (SE) onto West Lake Sammamish Parkway NE. Turn left at the Bel-Red intersection to stay on West Lake Sammamish Parkway NE. Park is on the left. Later in the day you will find it harder to find a parking spot so come early.
Idylwood (click the link for more park details) features a very nice swimming beach, including a bathhouse and restrooms. There are also picnic shelters and picnic tables. You want to exit the park to your left heading south. West Lake Sammamish Parkway has a well-marked bike lane. As you travel south on West Lake Sammamish Parkway NE the road becomes West Lake Sammamish Parkway SE. When you reach Lake Sammamish State Park (click the link for more park details) the street you are on becomes NW Sammamish Road (also SE 56th). This state park also features a very nice swimming beach, bathhouse, and restrooms. This can be an ideal spot to stop for lunch or a swim on a hot sunny day. If you plan this bike ride on a Saturday you can stop at the Issaquah Farmers Market at the Red Barn which is visible from the street. This is also a wonderful spot for lunch. If you keep traveling east on NW Sammamish Road you intersect with East Lake Sammamish Parkway SE. Just as you reach the stoplight you will see the East Lake Sammamish Trail. Modifications to the trail have it closed. Next summer this will be the second half of this bike ride. Through the end of this year and beginning of next you will need to retrace your steps to Idylwood Park.
The views of the lake are beautiful, the opportunity to take advantage of two wonderful parks, and the possibility of visiting the Issaquah Farmers market make this a wonderful bike ride. If it is hot and sunny most of the ride is shaded.