March fishing in the Wood River Valley can be some of the most productive, consistent fishing of the year. Rainbow trout in the Big Wood River, Big Lost River and Silver Creek are feeding aggressively as they prepare for the spring spawn. Area waters begin to warm as winter loosens its grasp, so fish become much more active. Brown trout in Silver Creek and the Big Wood will chase and attack streamers with a vengeance. Midge and Blue-Winged Olive (BWO) activity increases as the month progresses, and we have excellent dry-fly fishing on local waters.
Silver Creek is a tad off-color and the streamer fishing is on fire. The Picabo Angler custom-tied Sparkle Minnow is a top-producing fly, as are small black, brown or olive leech patterns. Fish the Sparkle Minnow and other baitfish imitations aggressively, and slowly strip or swing leech patterns. Do not be afraid to beef up your tippet and leader, as the takes can be violent.
Flows on the Big Lost River below Mackay Dam are holding stable at about 105 CFS, allowing for easy wading and concentrating fish in winter holding areas. Nymph fishing is particularly productive, and midges will appear during the afternoons. When nymphing, concentrate your efforts on edges and current seams. Effective flies include Rainbow Warriors, Copper Johns, Zebra Midges and San Juan Worms. Hint – a bit of orange or red on your nymphs is a very good idea!
Surface-feeding fish are often found in slow, skinny water; a stealthy approach is necessary. Baetis activity will ramp up toward the end of the month, extending through April. This can be some of the finest angling of the year on the lower Lost. Trail Creek Road is closed for the winter, but fishing the lower Lost in March is well worth the longer drive. Keep in mind that as the month progresses, there will be significant spawning activity on the river; be aware of fish on redds and let them do their thing.
Fishing on the Big Wood River and South Fork Boise River remains very good. Anglers are having success nymphing, fishing midge dries, and throwing sculpin patterns for the river’s biggest fish. Look for the best midge activity to occur during the afternoons. Griffiths Gnats, Trailing Shuck Midges, Sprout Midges and Zebra Midges should all be in your Big Wood winter fly box.
Happy fishing, everyone!