The following list is approximate. I've viewed records displayed in "An Atlas of Oregon Butterflies" by John Hinchliff to compile this list, but because of the scale of the maps viewed, I can't always vouch that some of the species listed may have been verified from areas more than 5-10 miles north or south of the Columbia River itself. The list is just a starting place to examine these beautiful creatures more fully in the Gorge.
Silver-spotted Skipper: Epargyreus clarus var. californicus - (eastern Multnomah County)
Northern Cloudy Wing: Thorybes pylades - (northern Wasco County- Sevenmile Hill?)
Dusky Wings of the Columbia River Gorge
Dreamy Dusky Wing: Erynnis icelus - (northern Hood River County)
Propertius Dusky Wing: Erynnis propertius - (northern Hood River and Wasco Counties)
Dyar's Dusky Wing: Erynnis pacuvius lilius - (near The Dalles, OR)
Persius Dusky Wing: Erynnis persius ssp. - (eastern Multnomah County and central Hood River County)
Two-banded Checkered Skipper: Pyrgus ruralis var. ruarlis - (northwestern and central Hood River County and northern Wasco County)
Common Checkered Skipper: Pyrgus communis - (northern Wasco County, northwestern Sherman County, northern Morrow County, and northwestern Umatilla County)
Large White Skipper: Heliopetes ericetorum - (northwestern Umatilla County)
Common Sooty Wing: Pholisora catullus - (northern Wasco County, northwestern Sherman County, and northern Benton County)
Arctic Skipper: Carterocephalus palaemon var. mandan - (northeastern Multnomah County)
Juba Skipper: Hesperia juba - (multiple sites along the Columbia River from Hood River east to Umatilla Gap)
Common Branded Skipper: Hesperia comma var. harpalus - (northeastern Gilliam County)
Sachem: Atalopedes campestris campestris - (northeastern Hood River County)
Sandhill Skipper: Polites sabuleti sabuleti - (northwestern Umatilla County)
Sonora Skipper: Polites sonora sonora - (northeastern Multnomah County)
Woodland Skipper: Ochlodes sylvanoides - (multiple sites along the Columbia River from eastern Multnomah County eastward to northwestern Umatilla County)
Dun Skipper: Euphyes vestris vestris - (northeastern Multnomah County)
Roadside Skipper: Amblyscirtes vialis - (northeastern Multnomah County, northern Wasco County and northwestern Sherman County)
Clodius Parnassian: Parnassius clodius claudianus - (northeastern Multnomah County and western Hood River County)
Oregon Swallowtail: Papilio bairdii oregonius - (northern Wasco, Sherman and Gilliam Counties, and northwestern Umatilla County)
Anise Swallowtail: Papilio zelicaon zelicaon - (northeastern Multnomah County, northern Hood River County, northwestern Wasco County, and northwestern Umatilla County)
Indra Swallowtail: Papilio indra indra - (northwestern Wasco County - Mid-Klickitat River drainage, Sevenmile Hill?)
Western Tiger Swallowtail: Papilio rutulus rutulus - (northern Hood River and northwestern Wasco Counties)
Two-tailed Swallowtail: Papilio multicaudatus - (northern Wasco and Sherman Counties)
Pale Tiger Swallowtail, Mountain Swallowtail: Papilio eurymedon - (northeastern Multnomah, northern Hood River, and northern Wasco Counties)
Becker's White: Pieris beckerii - (multiple sites from northern Wasco County east to northwestern Umatilla County)
Spring White: Pieris sisymbryii flavitincta - (northwestern Umatilla County)
Western White: Pieris occidentalis occidentalis - (multiple sites from norhteastern Multnomah County east to northwestern Umatilla County)
Mustard White: Pieris napi marginalis - (eastern Multnomah County and central Hood River County)
Cabbage White: Pieris rapae - (multipe sites from north-central Multnomah County eastward to northwestern Umatilla County)
Creamy Marble: Euchloe ausonides ausonides - (northern Wasco and northwestern Sherman Counties)
Pearly Marble: Euchloe hyantis lotta - (northern Morrow County)
Sara Orange Tip: Anthocharis sara flora - (northeastern Multnomah County)
Sara Orange Tip: Anthocharis sara stella - (northern Hood River and northwestern Wasco Counties)
Clouded Sulphur: Colias philodice eriphyle - (north-central Multnomah County, northern Sherman and Morrow Counties, and northwestern Umatilla County)
Orange Sulphur: Colias eurytheme - (north-central Multnomah County, northern Sherman and Morrow Counties, and northwestern Umatilla County)
Queen Alexandra's Sulphur: Colias alexandra edwardsii - (northern Sherman County and northwestern Umatilla County)
Ruddy Copper: Lycaena rubida - (northern Wasco, Sherman and Morrow Counties)
Blue Copper: Lycaena heteronea heteronea - (northwestern Wasco County)
Purplish Copper: Lycaena helloides helloides - (northern Wasco and Sherman Counties)
Nivalis Copper: Lycaena nivalis nivalis - (northwestern Umatilla County)
Mariposa Copper: Lycaena mariposa mariposa - (eastern Multnomah and western Hood River Counties)
Chinquapin Hairstreak: Habrodais grunus herri - (county line, Multnomah and Hood River Counties)
Behr's Hairstreak: Satyrium behrii columbia - (northwestern Sherman County)
Bramble Green Hairstreak: Callophrys perlexa - (northern Hood River County and northwestern Wasco County)
Cedar Hairstreak: Mitoura grynea barryi/nelsoni - (northeastern Multnomah County and juniper country in the far eastern Gorge)
Thicket Hairstreak: Mitoura spinetorum -
Brown Elfin, Western Brown Elfin: Callophrys augustinus (Synonym: Incisalia augustinus iroides) - (northeastern Multnomah County, northern Hood River County, and northwestern Wasco County)
Moss' Elfin: Incisalia mossii schryveri - (northwestern Wasco County)
Western Pine Elfin: Incisalia eryphon eryphon - (eastern Hood River and northwestern Wasco Counties)
Gray Hairstreak: Strymon melinus setonia - (northern Hood River, Wasco and Sherman Counties, northeastern Morrow County and northwestern Umatilla County)
Western Tailed Blue: Everes amyntula amytula - (northwestern Wasco County)
Spring Azure: Celastrina argiolus -
Echo Blue: Celastrina argiolus echo - (eastern Multnomah, northern Hood River and northwestern Wasco Counties)
Square-spotted Blue: Euphilotes battoides glaucon - (northwestern Wasco County, northern Sherman County, and northeastern Morrow County)
Pacific Dotted Blue: Euphilotes enoptes - (northern Wasco county and northeastern Morrow County)
Rocky Mt. Dotted Blue: Euphilotes ancilla columbiae
Arrowhead Blue: Glaucopsyche piasus toxeuma - (northeastern Wasco and northern Sherman Counties)
Silvery Blue: Glaucopsyche lygdamus columbia - (northwestern Wasco and northwestern Sherman Counties)
Boisduval's Blue: Icaricia icarioides -
Northern Blue: Plebejus idas ricei - (eastern Multnomah and eastern Hood River Counties)
Melissa Blue: Plebejus melissa melissa - (northwestern Wasco County, northern Morrow County and northwestern Umatilla County)
Lupine Blue: Plebejus icarioides pembina - (northern Hood River and Wasco Counties and northwestern Sherman County)
Lupine Blue: Plebejus icarioides icarioides - (northeastern Multnomah County)
Acmon Blue: Plebejus acmon acmon/lutzi - (eastern Multnomah County, northern Hood River, Wasco, Sherman and Morrow Counties)
Mormon Metalmark: Apodemia mormo mormo - (northern Hood River and Sherman Counties)
Great Spangled Fritillary: Speyeria cybele pugetensis - (northeastern Multnomah County)
Zerene Fritillary: Speyeria zerene picta - (northern Hood River and Sherman Counties)
Hydaspe Fritillary: Speyeria hydaspe rhodope - (eastern Multnomah County)
Western Meadow Fritillary: Boloria epithore chermocki - (northeastern Multnomah County and northern Hood River County)
Northern Checkerspot: Chlosyne palla sterope - (northeastern Hood River County, northern Wasco County, northwestern Sherman County, northeastern Gilliam County)
Hoffmann's Checkerspot: Chlosyne hoffmanni segregata - (northwestern Wasco County)
Pasco Crescent: Phyciodes selenis pascoensis - (northeastern Morrow and northwestern Umatilla Counties)
Field Crescent: Phyciodes pratensis pratensis - (northwestern Umatilla County)
Pale Crescent: Phyciodes pallidus barnesi - (near the mouth of the Deschutes River)
Mylitta Crescent: Phyciodes mylitta mylitta - (numerous sites from north-central Multnomah County east to northwestern Umatilla County)
Chalcedon Checkerspot: Euphydryas chalcedona colon - (northeastern Multnomah and northern Hood River Counties)
Chalcedon Checkerspot: Euphydryas chalcedona wallacacensis - (northern Wasco County)
Satyr Anglewing: Polygonia satyrus - (near the mouth of the Deschutes River?)
Faun Anglewing: Polygonia faunus rusticus - (northeastern Multnomah County and north-central Hood River County)
Zephyr Anglewing: Polygonia gracilis zephyrus - (northeastern Multnomah County and northwestern Wasco County)
Dark Anglewing: Polygonia progne - (northern Hood River County)
California Tortoise Shell: Nymphalis californica - (northeastern Multnomah County, northern Hood River County and northwestern Wasco County)
Mourning Cloak: Nymphalis antiopa antiopa - (northeastern Multnomah County, northern Hood River and Wasco Counties, northwestern Sherman County)
Milbert's Tortois Shell: Nymphalis milberti milberti - (northeastern Multnomah County and northwestern Sherman County)
American Painted Lady: Vanessa virginiensis - (eastern Multnomah County)
Painted Lady: Vanessa cardui - (north-central Multnomah County, northern Hood River County, and northwestern Wasco and Morrow Counties)
West Coast Lady: Vanessa annabella - (eastern Multnomah county, northwestern Sherman and Umatilla Counties)
Red Admiral: Vanessa atalanta rubria - (northeastern Multnomah County and northwestern Sherman County)
Viceroy: Limenitis archippus lahontani - (northeastern Wasco and Gilliam Counties, northern Morrow County, northwestern Umatilla County)
Lorquin's Admiral: Limentis lorquini burrisoni - (multiple sites from eastern Multnomah County eastward to northwestern Umatilla County)
Ochre Ringlet: Coenonympha tullia ampelos - (northeastern hood River County, northern Wasco County, northwestern Sherman County, and northwestern Umatilla County)
Large Wood Nymph: Cercyonis pegala ariane - (northwestern Wasco, Sherman and Umatilla Counties and northern Morrow County)
Great Arctic: Oeneis nevadensis nevadensis - (northeastern Hood River and northwestern Wasco Counties)
Monarch: Danaus plexippus plexippus - (northern Hood River, Wasco and Sherman Counties, and northeastern Gilliam and northwestern Umatilla Counties)
Unidentified Blue
Unidentified Skipper
Unidentified Caterpillar on Mt. Kittentails
Unidentified Caterpillar
Unidentified Caterpillar