201 ► California, Santa Clara County, San Jose, Alum Rock — Historic Alum Rock Park —

Near Penitencia Creek Road, on the left when traveling east.

202 ► California, Santa Clara County, San Jose, Alum Rock — Mineral Springs Grotto —

Near Alum Rock Road.

203 ► California, Santa Cruz County, Santa Cruz — 1055 — The Mystery Spot — A History —

Near Mystery Spot Road 0.3 miles north of Branciforte Drive.

204 ► California, Shasta County, Burney — Burney Falls —

Near Highway 89, on the left when traveling north.

205 ► California, Shasta County, Mineral, Lassen Volcanic National Park — Bumpass’s Hell — Kendall Vanhook Bumpass —

On Lassen Peak Highway (California Route 89), on the right when traveling north.

206 ► California, Siskiyou County, Dunsmuir — Upper Soda Springs —

On Upper Soda Springs Road near Stagecoach Road, on the left when traveling east.

207 ► California, Siskiyou County, Mt. Shasta — Mount Shasta —

Near West Alma Street near Maple Street when traveling south.

208 ► California, Siskiyou County, Tule Lake — Shore of Tule Lake —

Near County Route 120 near Hill Road (County Route 10), on the left when traveling west.

209 ► California, Siskiyou County, Weed — Mount Shasta —

Near California Route 97, on the left when traveling north.

210 ► California, Solano County, Vallejo — The Carquinez Strait: Gateway to California's Riches —

Near Dump Road at Lawes Street.

211 ► California, Trinity County, Douglas City — Reading’s Bar —

Near Steiner Flat Road.

212 ► California, Trinity County, Weaverville — Weaverville Basin Gold Discovery Site —

Near North Main Street (California Route 229) at Garden Gulch Street, on the right when traveling north.

213 ► California, Tuolumne County, Groveland — 5-1975 — Big Gap Flume —

Near Big Oak Flat Road (State Highway 120), on the left when traveling east.

214 ► California, Tuolumne County, Groveland — Trails and Waterfalls —

Near Hetch Hetchy Road.

215 ► California, Tuolumne County, Groveland — Water Quality at Hetch Hetchy —

Near Hetch Hetchy Road.

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216 ► California, Tuolumne County, Jamestown — 431 — Jamestown — Also Called Jimtown — Mark Twain Bret Harte Trail —

On Main Street at Donovan Street on Main Street.

217 ► California, Ventura County, Ventura — A Brief History of California State Parks — Preserving and Protecting our Heritage — San Buenaventura State Beach —

Near San Pedro Street at Pierpoint Boulevard.

218 ► California, Ventura County, Ventura — The Channel Islands —

Near the Ventura Pier near Harbor Boulevard.

219 ► Colorado, Alamosa County, Great Sand Dunes National Park and Preserve — A Landmark for People — Great Sand Dunes National Park and Preserve — National Park Service, U.S. Department of the Interior —

Near Highway 150.

220 ► Colorado, Alamosa County, Mosca — "Totally Unique and Unexpected" — Great Sand Dunes National Park and Preserve — National Park Service, U.S. Department of the Interior —

Near Highway 150 near Pinyon Circle.

221 ► Colorado, Alamosa County, Mosca — Dimensions — Great Sand Dunes National Monument —

On State Highway 150.

222 ► Colorado, Alamosa County, Mosca — Sangre de Cristo Ecosystem — Great Sand Dunes National Park and Preserve —

Near Highway 150.

223 ► Colorado, Alamosa County, Mosca — Stepping into Wilderness — Great Sand Dunes National Park and Preserve — National Park Service, U.S. Department of the Interior —

Near Highway 150.

224 ► Colorado, Alamosa County, Mosca — The Mountain Barrier —

Near Highway 150.

225 ► Colorado, Alamosa County, Mosca — Understanding the Great Sand Dunes System: the Sand Sheet —

On Lane 6N 1.2 miles west of State Highway 150, on the left when traveling west.

226 ► Colorado, Chaffee County, Poncha Springs — The Roof of the Rockies —

Near U.S. 285 just north of U.S. 50, on the right when traveling south.

227 ► Colorado, Conejos County, Antonito — Rocks on the Move — Lifting, Erupting, Wearing Away — Cumbres& Toltec Scenic Railroad National Historic Landmark —

On Fdr 103.

228 ► Colorado, Custer County, Wetmore — Hardscrabble Canyon Stratum — A Geological Intrigue —

On State Highway 96 at State Highway 67, on the right when traveling west on State Highway 96.

229 ► Colorado, Delta County, Delta — Ute Council Tree —

On G96 Lane at 1550 Road, on the left when traveling west on G96 Lane.

230 ► Colorado, Denver County, Denver, Central — 6w — Rails and Mountains — Wall Street of the Rockies — Seventeenth Street Denver, Colorado —

On 17th Street at Arapahoe Street, on the right when traveling south on 17th Street.

231 ► Colorado, Denver County, Denver, Central — 18e — Top of the World — Wall Street of the Rockies — Seventeenth Street Denver, Colorado —

On 17th Street at Glenarm Place, on the left when traveling south on 17th Street.

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232 ► Colorado, Douglas County, Castle Rock — The Rock — Gray Gold —

On Wilcox Street close to 3rd Street, on the right when traveling south.

233 ► Colorado, Douglas County, Larkspur — Southwest Rises The Summit of Pikes Peak —

On Southbound Rest Area (Interstate 25 at milepost 171), in the median.

234 ► Colorado, Douglas County, Littleton, Roxborough State Park — The Geology of Roxborough —

On Roxborough Drive 4.5 miles south of Watertown Road, on the right when traveling east.

235 ► Colorado, El Paso County, Calhan — Geology — Paint Mines Interpretive Park —

Near Paint Mine Road 1.5 miles east of North Calhan Highway.

236 ► Colorado, El Paso County, Cascade — The Continental Divide —

On Pikes Peak Hwy.

237 ► Colorado, El Paso County, Colorado Springs — Precious red stone — Red Rock Canyon Open Space —

Near High Street 0.4 miles west of Ridge Road.

238 ► Colorado, El Paso County, Colorado Springs, Cascade — A Look From The Top —

On Pikes Peak Toll Road.

239 ► Colorado, El Paso County, Colorado Springs, Cascade — Pike's Peak —

Near Barr Trail.

240 ► Colorado, El Paso County, Colorado Springs, Cascade — Ute Pass —

On Pike's Peak Highway, on the left when traveling south.

241 ► Colorado, El Paso County, Colorado Springs, West Colorado Springs — A Priceless Gift —

Near Garden Drive.

242 ► Colorado, El Paso County, Colorado Springs, West Colorado Springs — A Priceless Gift — Garden of the Gods Park —

Near Garden Drive.

243 ► Colorado, El Paso County, Colorado Springs, West Colorado Springs — Garden of the Gods Park —

On Gateway Road, on the right when traveling east.

244 ► Colorado, El Paso County, Colorado Springs, West Colorado Springs — The Amazing Balanced Rock —

On Garden Drive, on the left when traveling north.

245 ► Colorado, El Paso County, Colorado Springs, West Colorado Springs — The Garden of the Gods —

Near Garden Drive, on the right when traveling west.

246 ► Colorado, El Paso County, Colorado Springs, West Colorado Springs — Time Frozen In Stone — Garden of the Gods Park —

Near Garden Drive.

247 ► Colorado, El Paso County, Manitou Springs — Pike's Peak —

On Manitou Avenue (Business U.S. 24) at El Paso Boulevard, on the right when traveling west on Manitou Avenue.

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248 ► Colorado, El Paso County, Manitou Springs — Sacred Waters —

Near Manitou Avenue (Business U.S. 24) at Navajo Avenue, on the right when traveling west.

249 ► Colorado, El Paso County, Manitou Springs, West Colorado Springs — An Early Adventurer in Manitou —

On Washington Avenue at El Paso Boulevard, on the left when traveling north on Washington Avenue.

250 ► Colorado, Fremont County, Cañon City — 141 — Royal Gorge —

On County Road 3A 4.5 miles south of U.S. 24, on the right when traveling south.

251 ► Colorado, Garfield County, Glenwood Springs — Building Interstate 70 Through Glenwood Canyon —

Near Interstate 70 Frontage Road at milepost 121.

252 ► Colorado, Garfield County, Glenwood Springs — The Glenwood Springs Hydroelectric Plant —

On East 6th Street at North River Street, on the right when traveling west on East 6th Street.

253 ► Colorado, Garfield County, No Name — A Grand Boulevard —

Near Interstate 70 Frontage Road at milepost 119 east of No Name Lane (County Road 129).

254 ► Colorado, Garfield County, No Name — The California Zephyr —

Near Interstate 70 Frontage Road at milepost 119 east of No Name Lane (County Road 129).

255 ► Colorado, Gunnison County, Gunnison — Forming a Pinnacle —

On U.S. 50, on the right when traveling west.

256 ► Colorado, Hinsdale County, Lake City — A Volcanic History —

On Silver Thread Scenic Byway (State Highway 149 at milepost 76.8), 4 miles north of 8th Street, on the right when traveling north.

257 ► Colorado, Huerfano County, Walsenburg — 181 — Huerfano Butte — Beacon to Settlement —

On Interstate 25 at milepost 59, 0.3 miles north of County Road 103, on the right when traveling north.

258 ► Colorado, Jefferson County, Golden — Clear Creek —

On Washington Avenue.

259 ► Colorado, Jefferson County, Golden — Golden and Clear Creek —

On Washington Avenue Bridge, on the right when traveling north.

260 ► Colorado, Jefferson County, Golden — Late Jurassic Time —

Near Hog Back Road.

261 ► Colorado, Jefferson County, Golden — Rock Deformation —

Near County Road 93.

262 ► Colorado, Jefferson County, Golden — The Rocky Mountains —

Near Hog Back Road (State Highway 93) near West Alameda Parkway.

263 ► Colorado, Jefferson County, Golden — Volcanic Ash —

Near West Alameda Parkway.

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264 ► Colorado, Jefferson County, Golden, Lakota Hills — Our Changing Landscape-From Sea Floor to Mountain Top —

Near Lariat Loop Road.

265 ► Colorado, Jefferson County, Golden, Lakota Hills — What You Can See From Here Today —

Near Lariat Loop Road.

266 ► Colorado, Jefferson County, Morrison — Front Range Foothills —

Near Plains View Road.

267 ► Colorado, La Plata County, Durango — Pinkerton Hot Springs —

On U.S. 550 0.2 miles north of Academy Drive, on the right when traveling north.

268 ► Colorado, Larimer County, Rocky Mountain National Park — Continental Divide — Milner Pass     elev.   10,759 ft. —

On Trail Ridge Road (U.S. 34) 17.1 miles north of Western Road (County Road 49), on the right when traveling north.

269 ► Colorado, Larimer County, Rocky Mountain National Park — Glacial Cirque —

On Trail Ridge Road (U.S. 34) near Old Fall River Road.

270 ► Colorado, Las Animas County, Trinidad — 192 — Welcome to Colorado / Trinidad Country / Trinidad / Army of the West —

On Nevada Avenue at North Animas Street, on the right when traveling south on Nevada Avenue.

271 ► Colorado, Mesa County, Colorado National Monument — Ancient Environments —

Near Rimrock Drive.

272 ► Colorado, Mesa County, Colorado National Monument — Canyon In A Canyon —

Near Rimrock Drive.

273 ► Colorado, Mesa County, Colorado National Monument — The Grand View —

Near Rimrock Drive.

274 ► Colorado, Mesa County, Colorado National Monument — The Shapes of Erosion —

Near Rimrock Drive.

275 ► Colorado, Mineral County, South Fork — The Great Divide —

On U.S. 160 0.2 miles County Road 402, on the left when traveling west.

276 ► Colorado, Montrose County, Black Canyon of the Gunnison National Park — Pegmatite Dikes —

Near South Rim Road.

277 ► Colorado, Montrose County, Black Canyon of the Gunnison National Park — The Painted Wall —

Near Painted Wall Trail.

278 ► Colorado, Montrose County, Montrose — So Bold, So Beautiful a Land —

Near Chipeta Road north of U.S. 550, on the right when traveling north.

279 ► Colorado, Ouray County, Ouray — It's Our Fault —

Near Box Canyon Road south of 3rd Avenue.

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280 ► Colorado, Pitkin County, Aspen — The Continental Divide —

On Colorado 82, on the left when traveling west.

281 ► Colorado, Teller County, Florissant — The Big Stump —

Near County Route 1 south of County Route 421.

282 ► Colorado, Teller County, Florissant — The Fossil Beds — Florissant Fossil Beds National Monument —

On Teller County Route 1.

283 ► Colorado, Teller County, Florissant — What If? —

Near County Route 1 south of County Route 421.

284 ► Colorado, Weld County, Rockport — Majestic Plains —

On U.S. 85 0.3 miles south of County Road 126, on the right when traveling south.

285 ► Connecticut, Greater Bridgeport Region, Bridgeport, North Bridgeport — American Alligator — Alligator mississippiensis —

Near Noble Avenue north of Crown Street, on the left when traveling north.

286 ► Connecticut, Greater Bridgeport Region, Trumbull, Tashua — Tashua Hills —

On Merrimac Drive 0.2 miles north of Hills Point Rd., on the left when traveling north.

287 ► Connecticut, Lower Connecticut River Valley Region, Old Saybrook, Old Saybrook Center — The Saybrook Bar

Near College Street (Connecticut Route 154) east of Fenwick Street, on the left when traveling east. Reported permanently removed.

288 ► Connecticut, Lower Connecticut River Valley Region, Old Saybrook, Old Saybrook Center — The Saybrook Bar —

On College Street (Connecticut Route 154) west of Bridge Street ( Route 154), on the right when traveling west.

289 ► Connecticut, Northwest Hills Region, Litchfield — Stone Walls • Chestnut Grove • Wet Meadow —

Near South Street (Connecticut Route 65) north of Wolcott Street, on the right when traveling south.

290 ► Connecticut, Northwest Hills Region, Mount Washington — Bear Mountain, Connecticut —

Near Under Mountain Road (Route 41) 0.2 miles north of Westmount Road, on the left when traveling north.

291 ► Connecticut, Southeastern Region, Norwich, Norwichtown — 143 — Bean Hill — Legends & Lore —

On W Town Street (Connecticut Route 642) at Vergason Avenue, on the right when traveling west on W Town Street.

292 ► Connecticut, Western Region, New Milford — Highlights of Lover’s Leap State Park — New Milford, CT —

Near Still River Drive 0.2 miles east of Pumpkin Hill Road, on the right when traveling east.

293 ► Connecticut, Western Region, Norwalk — A Habitat Renewed —

On Seaview Avenue at East Avenue, on the left when traveling south on Seaview Avenue.

294 ► Delaware, Kent County, Dover, Fork Branch Nature Preserve — Welcome to Fork Branch Nature Preserve —

Near Kenton Road (County Road 104) north of Baltray Road, on the right when traveling north.

295 ► Delaware, New Castle County, Delaware City — Pea Patch Island —

On Park pathway.

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296 ► Delaware, New Castle County, Glasgow, Pencader Hundred — In the Beginning … — … formation of the Delmarva Peninsula —

On Pulaski Highway (U.S. 40) east of South College Avenue (Delaware Route 896), on the right when traveling west.

297 ► Delaware, New Castle County, Newark, Iron Hill Park — In the Beginning … — … formation of the Delmarva Peninsula —

Near South Old Baltimore Pike west of Iron Hill Road, on the right when traveling west.

298 ► Delaware, New Castle County, Wilmington — Brandywine Blue Gneiss and Barley Mill Gneiss — metamorphic —

On Kennett Pike (Delaware Route 52) north of Old Gatehouse Road, on the right when traveling south.

299 ► Delaware, New Castle County, Wilmington — Cockeysville Marble — metamorphic —

On Kennett Pike (Delaware Route 52) north of Old Gatehouse Road, on the right when traveling south.

300 ► Delaware, New Castle County, Wilmington — Gabbro — igneous —

Near Kennett Pike (Delaware Route 52) north of Old Gatehouse Road, on the right when traveling south.

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