This is walkers' day on the MetroScene:

* Jeff Smith arrived yesterday from Hemet, Calif., after 48 days on the road. A public school teacher and father of three, one of them a 3 1/2-year-old daughter who is a cerebral palsy victim and mildly retarded, walked transcontinentally in hope of gaining home-town pledges for special education in his community.

So far, $680.20 has been raised, and from his room at the hostel on I Street where he was doing his laundry, he said he hopes for more, especially when the word reaches home that he would visit the White House today. His return will be by bus.

While he isn't especially looking for financial support from Washingtonians, Smith said any would be welcome. They may be sent to the Hemet Valley Special Education Fund Association, c/o the Bank of Hemet, Hemet, Calif. 92343.

* Robert Sweetgall is scheduled to arrive at noon today at the Zero Milestone on the Ellipse, behind the White House, after walking 10,500 miles around the periphery of the 48 contiguous states. He started in Washington on Oct. 9 of last year, and walked via Florida, the Gulf Coast, the Pacific Coast, the Canadian border, New England and his home town of Philadelphia.

Sweetgall, 35, a chemical engineer, is a founder of the Foundation for the Development of Cardiovascular Health, an organization related to the University of Delaware. Along the way, he lectured on health matters to secondary school students. A spokeswoman said his odyssey is claimed as the longest pedestrian journey on record.