Although the national average price at the pump has slowly declined week-to-week, there are a number of states that haven't yet enjoyed the trend.
Most states enjoying lower gas prices lie east of the Rocky Mountains. Seven states, all west of the mountain range, are still seeing prices higher than they saw the month before.
Hardest hit is Oregon, which has had gas prices nearly 16 cents higher in May than they saw in April. California and Washington are also feeling the pain with gains of 14 and 13 cents.
Moving inland, the western states still have higher prices, but they're significantly less than their costal counterparts. In Idaho and Utah, prices are about 3 cents higher than they had been last month, while Montana and Nevada saw gas prices increase about one-tenth of 1 percent.