No need to bring a bag of peanuts with you if you ride the Discovery Trolley this summer.

It won't go to Utah's Hogle Zoo anymore.But tourism officials say the Utah Transit Authority's summertime trolley - which is really a bus - goes a long way toward keeping visitors happy and coming back to Salt Lake City.

The trolley will begin its annual seasonal voyage Monday.

Hogle Zoo officials decided not to participate in the transit program this year when the Downtown Alliance asked for a $1,000 contribution. In previous years, the zoo offered a discount to trolley passengers. But that wasn't enough this time.

The Downtown Alliance, which has raised about $21,000 to pay for the trolley's marketing and advertising, is requiring all sponsors to pay the $1,000 this year.

"We decided to only put (paying) sponsors on the map," said Lisa Kalantzes, marketing director for the Downtown Alliance. "It just became a situation where we wanted to be fair to our other sponsors who are committing money."

Andrew Wallace, marketing director for the nonprofit Hogle Zoo, said the zoo does not have that kind of money to spend.

"We have a very tight budget, so we have to look at really what's the best use of our money," Wallace said. "We did make the offer that we'd like to continue as we had in the past, admitting people with a $1 discount with their trolley ticket."

Wallace said a minimal number of people actually took the trolley to the zoo in recent years.

All of the other usual stops are back on the trolley route, including This is the Place State Park and Deseret Village, across the street from the zoo. Trolley patrons could exit there and walk to the zoo.

The trolley - a fleet of four diesel-powered, four-wheel buses - is designed as a replica of the electric trolley cars that dominated the city's streets earlier this century.

The trolley will leave Trolley Square every half-hour daily between 10 a.m. and 6 p.m. It will make a loop around downtown Salt Lake City, stopping at museums, shopping malls, historic sites and convention facilities.

"We have found that a lot of convention delegates have extra time and they like to use it. Visitors use it quite extensively and really like the convenience of it," said Carl Little, vice president of tourism for the Salt Lake Convention and Visitors Bureau. "A lot of them go places they would not go otherwise."

The cost is $4 for adults, $2 for children and senior citizens. Children age 5 and younger ride free. A family pass can be purchased for $10.

The trolley will operate Monday through Saturday, June 1-Oct. 24. It will operate on July 4 and July 24 but not Labor Day.

"It adds a unique flavor to the city" Kalantzes said. "It's great for kids. You can give them an all-day pass and they can go all over."

UTA spokeswoman Coralie Alder said UTA about breaks even on the trolley. The agency has provided a downtown trolley-bus service, under various names and forms, since 1989.

Last year, the trolley carried 23,999 passengers. Total operating costs were $60,320, with a $19,000 marketing campaign paid for by the Downtown Alliance. In 1996, the trolley cost $62,640 to operate and the alliance contributed $21,700 for advertising.