Wildfires strain outdoor tourism business in western U.S.

SALMON, Idaho, Aug 18 (Reuters) - Wildfires sweeping across

the western United States are straining communities that depend

upon the summer tourism season, as recreation sites catch fire,

campgrounds close and outdoor activities such as river rafting

are disrupted.

In the mountains of central Idaho, where whitewater rafting

has replaced logging as an economic mainstay, blazes are

curtailing trips on rivers whose world-class rapids draw an

international crowd of thousands from June through August.

Tourists who booked rafting trips months in advance have

been canceling their reservations, spooked by fast-changing

blazes that have produced a smoky haze and led to road

blockages.

"We've had nothing but cancellations," said Lorali Simmons,

owner of River Shuttles, a business in Salmon, Idaho, that

shuttles vehicles for boaters on the Middle Fork and the Salmon

River's wild and scenic corridor.

The wildfires that have scorched 80,000 acres (32,375

hectares) of mountain pine forests in east central Idaho

stranded 300 Middle Fork rafters northwest of Salmon this week

after falling rock closed the only road to the site.

Dozens of fires are burning out of control across parched

Western states, including California, where blazes have

encroached on national parks.

A survey released this week by the U.S. government shows the

number of Americans engaging in outdoor recreation rose last

year for the first time in three decades. At the same time,

remote, sparsely populated communities in western states have

tried to remake themselves as gateways to natural resources that

attract visitors.

In recent years, fires, floods and heat waves have taken a

toll on a tourism industry that the Outdoor Industry Association

says generates more than $35 billion combined for Idaho,

Colorado and California annually.

There is no detailed accounting of the extent of tourism

losses from fires and other natural disasters, but tour

operators say they worry about losses due to fires as well as

those that arise from cancellations by worried customers.

"It could potentially be devastating," said Kristin McMahon

of Idaho Rocky Mountain Ranch in Stanley, a base for dozens of

river outfitters and key launch sites for the Middle Fork Salmon

River through the Frank Church River of No Return Wilderness.

Wildfires have burned 6.5 million acres (2.63 million ha)

across the United States so far in 2012, about 1.5 million acres

more than the 10-year average for this time of year, according

to the National Interagency Fire Center.

COLORADO BLAZES

In Idaho, campground closures and disrupted river runs began

earlier this month and have stretched southwest from the state

capital Boise through the Sawtooth Mountains near Sun Valley.

August is critical for the 175 licensed outfitters who offer

float and jet boat rides in Idaho, which has more river miles

than any other state except for Alaska, said Grant Simonds, head

of Idaho Outfitters and Guides Association.

"River outfitting operations pay their bills and overhead

expenses with June and July; August represents the 5 to 10

percent profit they stand to net," he said.

In Colorado, two huge blazes in June all but snuffed out

tourism in some areas. The 88,000-acre (35,612-ha) High Park

Fire northwest of Fort Collins burned onto the Roosevelt

National Forest, one of the most visited U.S. national forests.

Large sections of the forest, including certain campgrounds

and trails, remain closed, said U.S. Forest Service spokeswoman

Reghan Cloudman.

There was "absolutely an impact" on recreational activities

such as rafting on the Cache La Poudre River, mountain biking

and hiking, she said.

In southern Colorado, the Waldo Canyon Fire forced the

evacuation of 5,000 residents of Manitou Springs, situated at

the foot of Pikes Peak and other tourist attractions near

Colorado Springs.

"It's been far worse than we expected," Roger Miller, chief

operating officer of the Manitou Springs Chamber of Commerce,

said of the fire's impact on the town.

Miller said that even though the blaze never reached Manitou

Springs, the fire cost $2 million in tourist revenues, cut

lodging reservations in half, shuttered two businesses and

placed another 15 at risk of closure.

In northern California, two fires caused by lightning have

blunted tourism in the area around Lassen Volcanic National

Park. Sharon Roberts of the nearby St. Bernard Lodge said she

had received numerous cancellations.

"It's tough. It's going to be tough for the whole

community."

(Additional reporting by Keith Coffman in Colorado and Ronnie

Cohen in California; Editing by Alex Dobuzinskis and Paul Simao)