Heavy Snows Delay Trail Ridge Road Opening for Memorial Day Weekend Trail Ridge Road in Rocky Mountain National Park ill not open for the Memorial Day Weekend</STRONG>. The amount of winter snowpack that faced park snowplow operators when plowing began, combined with recent storms, have hampered park snow plowing efforts. Last week's snowstorm produced 17 foot drifts above Rainbow Curve on the east side of the park. There is more snow along that section of road now than there was on May 5. Park plow operators on the west side of the park are dealing with significant snow accumulation, drifting and rock slides. Longtime park snowplow operators indicate this is the most snow they have encountered, this late in the season, in almost 30 years.