The Blue River below Dillon Reservoir is seeing heavy traffic, especially on weekends. Light tippets, 5x-7x, are in order. Most are using mysis shrimp and midge patterns. Under cloud cover, look for rising fish. Once you get further downstream, standard mayfly nymphs will also work.
Downstream, Green Mountain Reservoir continues to produce a smaller lake trout and occasionally a larger specimen. Tube jigs are popular, but spoons such as Kastmasters or Daredevils will also work on occasion. Though most lake trout are found in deeper water, more than 30 feet, fishing shallow with smaller jigs has a good chance of producing rainbows.
South Park's Antero Reservoir is slow fishing. Fishing bait tight to the bottom will produce a few trout and suckers. Once the edges soften in a few weeks, putting fresh water into the system, look for things to pick up. A better bet - and it's not hot - is nearby Eleven Mile Reservoir. Some successful anglers have been using micro jigs in 5-10 feet of water. Tipping them with meal or wax worms is recommended. The best action is reportedly early, with many calling it a day around lunch.
Granby Lake has several inches of snow coating over a foot of ice. Lake trout continue to be the draw here, although a surprising number of them are coming from fairly shallow water, less than 30 feet and near shore, which is typically rainbow trout domain. Though most of the fish are in the lower 20-inch range, persistent anglers are managing an occasional fish in the 30-inch class. Tubes tipped with sucker meat are the mainstay of most anglers, but jigging Rapalas or similar lures are also a good option.
Editor's note: Dave Coulson is the Colorado state editor for FishExplorer.com. He contributes a weekly fishing report to the Summit Daily News. For more local and regional fishing info, visit www.fishexplorer.com.