BIRD WALK, LOOKOUT MOUNTAIN - Point Park, Lookout Mountain Battlefield Visitor Center. Author Joe LaFleur leads one-hour bird walk for beginner and experienced bird watchers, 11:30 a.m. Sunday. $3 for participants 16 and older (free with National Park pass). 423-821-7786, 706-866-9241.
BIRD WALK, LOOKOUT VALLEY - Chattanooga Nature Center, 400 Garden Road. Guided Wake Up With the Birds walk, 7:30 p.m. Saturday (repeats April 16, 23, 30, May 7, 14). Nonmembers $8 adults, $5 seniors and children 4-11. Reservations recommended. 821-1160, ext. 0.
BIRD WALK, SEWANEE - Meet at Spencer Hall, University of the South, Sewanee. Sewanee Herbarium presents bird walk with Dr. David Haskell, 8 a.m. Saturday, 7:30 a.m. April 23 (all times Central). 931-598-3347, firstname.lastname@example.org; http://lal.sewanee.edu/herbarium.
BLESSING OF THE BIKES - Ringgold United Methodist Church, 7484 Nashville St., Ringgold, Ga. Group blessing for motorcycle riders, followed by individual blessings upon request, 11 a.m. Saturday, with live band, drinks and snacks. 678-938-1386.
BOOK SALE - Eastgate Town Center, 5600 Brainerd Road. Friends of the Bicentennial Library's semiannual sale of books and media, through Monday. Hardbacks $2, paperbacks $1 for adult titles; children's titles less, special collections priced as marked. Hours: 9 a.m.-7 p.m. today, Saturday and Monday, noon-6 p.m Sunday. Books half-price on Sunday, $3.50 per bag on Monday. www.friendsofthelibrary-chattanooga.com/book-sales.html.
CHATTANOOGA GHOST TOURS - From Walnut Street Bridge (downtown end) to Read House. One- and two-hour tours with several stops along the way for ghost stories and place histories, 8:15 nightly. $14 adults, $9 children under 12. 821-7125, www.chattanoogaghosttours.com.
CHATTANOOGA RIVER MARKET - Tennessee Aquarium plaza, 1 Broad St. Vendors showcase locally produced arts, crafts and horticultural goods, 10 a.m.-5 p.m. Saturday. Free yoga, 10 a.m. Music by The Blushin' Roulettes, 12:30 p.m. 648-2496, www.Chattanooga Market.com.
COIN SHOW - Northwest Georgia Trade & Convention Center, Exit 333 off I-75, Dalton, Ga. More than 300 dealers on hand for Georgia Numismatic Association Coin Show, April 15-17. Free admission. www.gamoney.org.
DOLL SHOW - Catoosa County Colonnade, 264 Catoosa Circle, Ringgold, Ga. Show and sale by Chattanooga Doll Club includes antiques, Barbies, hard plastic, GI Joes, artist dolls, composition, fashion dolls, doll books and clothing, 10 a.m.-4 p.m. Saturday. $4 ages 12 and older. Free parking. Contact: Elsie DeLeon, 423-596-8167.
GREENWAY SHOWCASE - Greenway Farm off Hamill Road. Series of events spotlighting the North Chickamauga Creek Greenway concludes Saturday. 842-1163, www.northchick.org.
* Tree tour with Dr. Hill Craddock of UTC, 9-10 a.m. Kids activity: Make your own tree guide.
* "Restoring the Native Meadow" with Terri Ballenger of Tennessee State Parks, 10:15-11:15 a.m.
* Presentation of the historic Sniteman cabin, 11:30 a.m.-12:30 p.m. Kids activity: Scavenger hunt.
PARTY FOR THE PLANET - Chattanooga Zoo, 301 N. Holtzclaw Ave. Celebrate Earth Day by learning ways to make sound environmental decisions, 10 a.m.-3 p.m. April 16. Free with regular zoo admission: $8 adults, $6 seniors, $5 children 3-15. 697-1319.
STARGAZING - Jones Observatory, 10 Tuxedo Ave. Spring programming about the night sky, 6:30-9 p.m. Sundays. This week's topic: Titan. Featured constellation: Leo. 425-4518.
TRAIN RIDES - Departing from Tennessee Valley Railroad, 4119 Cromwell Road. 894-8028, www.tvrail.com. Missionary Ridge Local is six-mile, 55-minute ride through East Chattanooga and to TVRM's repair shop. Full schedule (10:40 a.m., 12:05, 1:15, 2:25 and 3:35 p.m.) Saturdays and Sundays; limited scheduled (10:40 a.m. and 12:05 p.m.) Tuesday-Friday. $15 adults, $9 children ages 3-12.
WILDFLOWER HIKE - Sequatchie Valley Institute, 1233 Cartwright Loop, Whitwell, Tenn. See wildflowers on moderate-terrain hike, 11 a.m. CDT Saturday. Picnic lunches are welcome. Come an hour early for hayride pulled by biodiesel tractor. Donations of $5 to $20 requested. 423-949-5922.
BOOK SIGNING - Belk, 2100 Hamilton Place Blvd. Hixson resident Cindy C. Harris signs copies of her children's book, "Raoke and the Camp Raid," noon-4 p.m. Saturday. Email email@example.com.
All locations of Chattanooga-Hamilton County Bicentennial Library system have programs and activities. Call downtown, 757-5314; Eastgate, 855-2685; Northgate, 870-0636; Ooltewah/Collegedale, 396-9322; South Chattanooga, 825-7237. The central information number for all branches is 757-5310. www.lib.chattanooga.gov.
CHILDREN'S STORY HOUR
* Barnes & Noble, 2100 Hamilton Place Blvd., 893-0186, 11 a.m. Wednesdays.
* Books Never-Ending, 2547 Cloud Springs Road, Rossville, 10:30-11:30 a.m. Saturdays for ages 3-8. 706-891-0774, www.booksneverending.com.