The tours run through October. Space is limited and advance registration is required. Visit www.nature.org/utah or call 801-531-0999 to register and for more information.

11th annual Spring Cycle Tour in Yellowstone

West Yellowstone is holding its 11th annual Spring Cycle Tour on May 10. The 64-mile route goes through two states over two mountain passes and around three lakes.

Riders of all abilities are welcome to participate; feed stations are strategically placed and vans will patrol the cycle route to give fatigued cyclists a ride when needed and to provide mechanics to help with repairs.

Preregistration is $45 for adults and $35 for children. The fee increases by $5 after April 29. A portion of the proceeds goes to the Yellowstone Park Foundation. For more information or to register, visit www.cycleyellowstone .com.

Roy Webb reading

Historian Roy Webb will hold a reading and signing of his book, Riverman: The Story of Bus Hatch, May 2 at 7 p.m. at Ken Sanders Rare Books, 268 S. 200 East, in Salt Lake City. The event is free.

Orienteering

The Orienteering Club in Utah is holding an event May 10 on the Jordan Parkway, 12300 South, in Draper from 3-5 p.m.

The club sponsors a number of events each year. Visit www.o-utah.org for more information on the family friendly activities.

Birding trips

Great Salt Lake Audubon is holding the following birding trips. Beginners are welcome and carpooling is encouraged with a contribution suggested to help pay for gas.

Bob Huntington and Deedee O'Brien will lead a the monthly half-day trip to Farmington Bay Wednesday. Meet at the McDonald's north of the Centerville exit (319) on Interstate 15 at 7:30 a.m. Call Deedee if you plan to attend.

Bob Huntington will lead a trip to Yellow Fork Canyon in the Oquirrh Mountains on May 3. Meet at at 7:30 a.m. at the ShopKo in Sugar House or the REI parking lot in Sandy at 8 a.m.

State Park events

Friday - Nightime in the Goblins, a park naturalist will lead an evening walk at Goblin Valley State Park near Hanksville. Meet at 8 p.m. at the observation point. Call 435-564-3633 for more information.

Saturday - Wasatch Mountain State Park in Midway is celebrating Earth Day by teaching participants how to make recycled paper using materials from their homes. The program is free and runs from 11 a.m. to noon. Call 435-654-1791.

Saturday - Learn the art of birding by ear during a Junior Ranger program at the Fielding Garr Ranch at Antelope Island State Park. The events begins at 10 a.m. The event is intended for children ages 6-12, but everyone is welcome. Call 801-721-9569.

Saturday - Learn the history of sheep ranching on Antelope Island at 2 p.m. Call 801-649-5742 for more information.

Saturday - Learn about the food chain at Antelope Island State Park at 3 p.m. at the park's visitor center at 3 p.m. Call 801-721-9569.

Saturday - Wildlife biologist Ann McLuckie will lead a hike and talk about desert reptile awareness at Snow Canyon State Park near Ivins at 9 a.m. A slide show on desert adaptations will take place at the park at 6:30 p.m. Space is limited, call 435-628-2255 to hold a spot.

Saturday - A Junior Ranger program on Incredible Insects will be held at 9:30 a.m. at the Observation Point at Goblin Valley State Park near Hanksville.

May 1-31 - In conjunction with the Great Salt Lake Bird Festival, Antelope Island State Park will hold a photographic exhibit by keynote speaker Bruce Thompson.

May 2-3 - Utah State Park naturalists Kathy Donnell and Wendy Wilson will lead a program on birds of prey at 6:30 p.m. on May 2 at Snow Canyon State Park near Ivins. Live birds will also be at the park headquarters for visitors to see on May 3. Space is limited. Register by calling 435-628-2255.

May 3 - A Junior Ranger program on how native people gathered food will be held at Antelope Island State Park at 2 p.m. Call 801-649-5742 for more information.

May 3 - The Ogden Astronomical Society and Weber State University are hosting a star party on Antelope Island at White Rock Bay at 8:30 p.m. Call 801-721-9569.

May 3-4 - Edge of the Cedars State Park Museum near Blanding is holding the Four Corners Indian Art Festival from 9 a.m. to 5 p.m. The event is free. Call 435-678-2238 for more information.

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* To get your event listed, e-mail the information to brettp@sltrib.com or by mail to Brett Prettyman, The Salt Lake Tribune, 90 S. 400 West, Suite 700, Salt Lake City, UT 84101.