household size was 2.94 and the average family size was 3.47. In the city, the population was spread out, with 33.2% under the age of 18, 10.1% from 18 to 24, 26.8% from 25 to 44, 18.5% from 45 to 64, and 11.4% who were 65 years of age or older. The median age was 30 years. For every 100 females, there were 107.6 males. For every 100 females age 18 and over, there were 109.8 males. The median income for a household in the city was $31,023, and the median income for a family was $37,995. Males had a median income of $26,625 versus $22,734 for females. The per capita income for the city was $12,898. About 10.3% of families and 15.6% of the population were below the poverty line, including 20.8% of those under age 18 and 14.2% of those age 65 or over. Parks and recreation Within St. Anthony there are several city parks and walking trails offering many different recreational activities. Along the south side of the Henrys Fork there is the Greenway Trail, which starts near the US 20 junction with Bridge Street and continues south for a few miles. There is also a swimming area along the river, several baseball diamonds and a skate park. Located north and northwest of the city is the St. Anthony Sand Dunes, a 10,600 acre area of white quartz sand protected by a wilderness study area and containing one of the largest herds of wintering elk in the United States. Along with the 2,500 elk that winter near the sand dunes, there are also 1,500 mule deer and 500 moose in the area. During their time in around the sand dunes, the big game will shed their antlers and come spring, several hundred people are known to come to the dunes to collect these. This area is also popular for off-road vehicles and bonfires. There are several resorts surrounding the dunes. Some of the dunes reach up to 400 feet tall. Government and infrastructure The Idaho Department of Correction operates the St. Anthony Work Camp in St. Anthony. The United States Postal Service operates the Saint Anthony Post Office in Saint Anthony. St. Anthony is part of the Fremont County Joint School District. Within the city there is Henrys Fork Elementary, South Fremont Junior High and South Fremont Senior High. For both junior and senior high school, St.