OUTPOST.

For the whole family: Soroptimist International of Fillmore will sponsor its seventh annual Imogene Vest Family Fishing Derby from 6 a.m. to 3:30 p.m. on Saturday at Ventura County's Piru Lake.

Six tagged trout will be worth a total of $1,000 in prizes, including one valued at $500. Heaviest catches of bass, trout and panfish will fetch winners $100 each.

A special youth derby for ages 15 and younger will end at 2 p.m., and a children's casting contest will be staged from 11 a.m. to 1 p.m.

Registration for children ages 6 to 11 is $6. Family tickets cost $35. Children ages 3 to 5 can participate for free. All proceeds go to the Imogene Vest Memorial Scholarship Fund, which provides a graduating senior at Fillmore High a $1,000 scholarship.

Information: [phone] or [phone].

On tap tonight: West Yellowstone, Mont., fly-tier, angling guide and lecturer Bob Jacklin will speak tonight at 7:30 to the Pasadena Casting Club at the Masonic Hall, 3130 Huntington Dr. in San Marino.

A New Jersey native, Jacklin grew up targeting brook trout. He has operated his own tackle shop since 1974 and frequently tours the country to discuss casting technique, tackle selection, knot-tying and basic entomology.

The meeting is open to all visitors. Information: [phone].

Bass biz: The next stop on the WON BASS-Southern California Region Team Tournament circuit is Saturday at Santa Barbara County's Lake Cachuma.

Last year's champions, Greg and Harvey Stump of Newbury Park, who manufacture Robo plastic worms, boated a seven-fish limit weighing 17.26 pounds to collect $3,430 in prize money.

On-site registration takes place Friday from 8-10 p.m. and again Saturday from 3:30-5 a.m. at the Lake Cachuma Recreation Hall. Information: [phone].

Kids only: Corona Lake in Riverside County will host its first Super Fish Kids Klub derby Saturday.

The $5 entry includes lunch, awards and prizes. Information: [phone].

Steelheaders unite: Fisherman Tom Pero will regale the Wilderness Fly Fishers of Santa Monica, guests and visitors with tales of steelhead and salmon during a 6:15 p.m. club meeting Tuesday at the Olympic Collection, 11301 Olympic Blvd. in West Los Angeles.

Information: [phone].

Spring flower hikes: For an encyclopedia of things to do in the local range, take a peek at the spring edition of ``Outdoors in the Santa Monica Mountains National Recreation Area.''

The free booklet, which list hikes, walks, comet watching, Sunday concerts and campfire programs slated in April, May and June, is available by calling the National Park Service at [phone], ext. 201, or by writing to: Outdoors, Santa Monica Mountains National Recreation Area, 30401 Agoura Road, Suite 100, Agoura Hills, Calif., 91301.

``The `Outdoors' has an adventure for everyone from the novice hiker to the expert,'' said Arthur E. Eck, superintendent of the National Recreation Area.

Hear ye, hikers: The Inyo National Forest is now on the Internet.

That's right, the region known around the world as the eastern gateway to the High Sierra can be accessed via a new Web site. The address is www.r5.pswfs.gov/inyo/ and browsers can discover a virtual visitor center filled with information on camping, hiking, fishing and other recreational opportunities. Wilderness permits required to hike the backcountry can be obtained on-line. Details concerning off-highway vehicle, mountain-biking, snowmobiling and cross-country skiing opportunities are also highlighted. The latter group of activities will be of particular interest to anglers looking for something to do on April 27 - the day after the Eastern Sierra trout opener, when fishing is traditionally mediocre.

Volunteers needed: The Pacific Crest Trail Association is looking for volunteers to help with maintenance projects in the coming weeks in Cleveland National Forest and at other Southland sites along the transcontinental trail. Information: [phone].

Salty plans: Jacqueline E. Schafer, director of the Department of Fish and Game, has announced plans to form a new Marine Resources Region to be headquartered on the Central Coast. The program is operated out of Sacramento.

Schafer said the first step of the plan is to establish a task force to change the program direction from the traditional species-by-species regulation to an integrated nearshore ecosystem management approach.

That's cold-blooded: The U.S. Fish and Wildlife Service has reopened the comment period on its proposal to list the flat-tailed horned lizard - a small, rare reptile found in California, Arizona and Mexico - as a threatened species under the Federal Endangered Species Act.

The lizard's range includes the Coachella Valley in Riverside County and the Imperial and Borrego valleys in San Diego and Imperial counties.

Comments are invited until May 9 and should be sent to: Field Supervisor, U.S. Fish and Wildlife Service, Carlsbad Field Office, 2730 Loker Ave. West, Carlsbad, Calif., 92008. Copies of the Bureau of Land Management's ``Flat-tailed Horned Lizard Rangewide Management Strategy'' are available for review by writing to: BLM, 6221 Box Springs Blvd., Riverside, Calif., 92507.