Bottom one-third is almost pure friction climbing on some pretty slick sandstone. Listed in Stewart Green's Red Rock guidebook as 5.7, but I thought the bottom third of Frigga was definitely tougher than anything on Helios (5.7+) which is two routes left. Worth a climb after doing El Sol.
Location
Farthest right anchors on Solar Slab.
Climb El Sol, then once on top traverse right 15 ft from El Sol anchors to set the top-rope on the two Frigga anchors.
Recommend buying Stewart Green's Red Rocks Guidebook at Garden of the God's visitor's center for complete Red Rocks route descriptions/locations.