Guaranteed cold and clear! Alto-Alto - Upper South Boulder Creek has great paddling fun from the get-go. This classic Colorado creek run can be accessed from a variety of launch points. Put-ins range from one to four miles above Rollinsville with tricky private land river access issues and a few man-made features. The river is alpine grade steepness near the Moffat Tunnel, rolling and falling away in sections. The river then begins pooling and dropping in stage pools from mining in the Tolland Valley.
After a boater has slid under HWY 119 you will pass the Rollinsville Yacht club on river right through the thick willow then the canyon tightens.
Hit the Opener surf wave then the rapids increase and the train feels like its in the river with you if you have the luck of hitting the rapid when the train is coming.
Rapid of Note: The U.P. Cascade: Eddy out river left to scout before the river turns back to the right and plunges down a cascade with a wall on river right and the train tracks on river left. This rapid differs tremendously between 350 and 600 CFS creating two river-wide ledges at higher flows that stomp. The static and unnatural shoreline on river left mirrors river right shoreline.
Spanky rapid is followed by a few tight turns and river splitting islands.
*Edge season fun-fact: Long vertical icicles at head height near island splits bring on new meaning to ice cream headache.
In the exit of the canyon section a paddler will notice significant riverbed alteration as entering the private land owner whom has taken liberties with the streambed. The land owners in here (above the Icehouse property river left) have tried to create some trout habitat, apparently without consulting Gary Lacey about boulder placement.
** Unique Colorado river hazard: This is the only run in Colorado where kayakers can be run over by Semi Trucks while boating. (private land owner is trucking trailer loads of gravel out of the former Ice House property by crossing the creek daily)
Alto-Alto has a great but little canyon section, the occasional crazy naked gold miner and the front range kitty kat is home to this canyon. Beware metal sieve at railroad track crossing overhead and railroad debris and low bridge in the creekbed near takeout.
Wood frequently moves through this run, so heads up!
See Colorado Rivers and Creeks II, by Banks and Eckardt (The Bible), for info on this and most of the other cool runs of Colorado.
Lat/longitude coords are approximate, from TopoZone.
The creeks of Boulder County,Jasper Creek (Class V+/VI),The Source (Class V),Upper Boulder Canyon (Class V,V+),Lower Boulder Canyon (Class IV),Boulder Town Run (Class II/III),North Fork Boulder (Class V+/VI),Alto-Alto (Class IV),Upper South Boulder (Class V+/VI),Lower South Boulder (Class IV/V+/VI),Eldorado Canyon (Class V+).
The creek sweeps from right to left at a rockwall, then down into this cascading rapid.
Note the railroad tracks tight against the left shoreline and a cliff wall on river right. (scout from river left at small cobblestone beach)
The Colorado Division of Water Resources gauge is South Boulder Creek at Pinecliffe
Permits are not required for this reach.
39.9294013977051,-105.425003051758
39.9161987304688,-105.425003051758
NA
From Boulder; drive West on HWY 119 toward Nederland, (obey the speed limits entering Nederland or pay!), go South through the traffic circle and pass by the Eldora Ski turnoff and keep climbing up and out of Ned. Enter Gilpin County and finish the climb and coast on down into Rollinsville.
Take a right hand turn toward Moffat Tunnel/ Moffat Pass.
If you turn left toward the historic bar you will find junk food and drinks at the corner store.
(Please drive slow, there are lots of folks and dogs taking it easy in Rollyworld.)
Proceed either to the first river crossing and put-in (the standard), or.... drive the 10 miles toward Moffat Tunnel and explore some steepness and fast, clear and cold Upper South Boulder.
typical colorado
After the Island Turn Rapid
Entrance to the Union Pacific Rapid
AltoAlto Upper South Boulder
Lower Alto Alto - SBC, CO
Alto Alto-Early Season
If someone gets hurt on a river, or you read about a whitewater-related injury, please report it to American Whitewater. Don't worry about multiple submissions from other witnesses, as our safety editors will turn multiple witness reports into a single unified accident report.
Alamosa, Colorado - American Whitewater needs your help to define streamflows that support the full range of recreational boating opportunities on the Rio Grande and Conejos Rivers in Southern Colorado. Information provided by you will help set goals for flows and physical conditions to protect and enhance streams, and inform multi-objective projects to improve ecological, recreational, and community values. Please participate in our survey today!
Longmont, Colorado - As part of a comprehensive Stream Management Plan for the St Vrain Creek Watershed, American Whitewater is collecting and compiling data on recreational uses, and identifying projects and strategies to improve stream health, recreation, and environmental conditions in the region. You can help with this extensive effort. Please participate in the Recreational Flow survey.
Colorado Gives Day is on December 4 this year and is fast approaching! Go here to schedule your online donation to support American Whitewater's Colorado River Access Program. All donations made to American Whitewater on Colorado Gives Day (December 4) will be put towards our River Access Program in Colorado. American Whitewater works to improve river access and public safety throughout the state by working with landowners and managers, paddlers, law enforcement, and lawmakers to understand Colorado's river access laws and the ongoing threats to public safety. Thank you for your support!
Crested Butte CO - Alleged disruption to a Heron Rookery and concerned private landowners have led to a "Voluntary Closure" of the Slate River from the Gunsight Bridge to the Town of Crested Butte between March 15 and June 21 for the 2019 season. The Slate River between Oh Be Joyful Campground and Skyland Bridge, a 10.5 mile stretch, provides an incredibly scenic and unique flatwater paddling experience in the Gunnison Valley. The Voluntary clsoure is a product of the Slate River Floating Management Plan, created by a Working Group convened by the Town of Crested Butte and the Crested Butte Land Trust. The Working Group was created in direct response to pressure from the local community including conservationists and private landowners adjacent to the river, who are concerned that a recent increase in boating activity is disturbing a Heron Rookery that straddles the Slate River.
Today, September 5, marked the close of the public review process for the DRAFT Wilderness Evaluation Report. The Evaluation Phase is the second step of 4 different steps required in the assessment of lands that may be suitable for inclusion in the National Wilderness Preservation System (NWPS). American Whitewater thoroughly reviewed the DRAFT Wilderness Evaluation Report and submitted our comments to the Forest Service on September 4, 2018. Overall, we found that key paddling reaches throughout the GMUG area were greatly under-represented in the Polygon narratives and thus weren't acknowledged as contributing factors to the Polygon's respective Wilderness Ratings. We let the Forest Service know this, highlighting specific paddling reaches that should be added to each Polygon and which Polygons we believe should have a higher Wilderness Rating based on the high-quality recreation opportunities that each area has to offer.
Please stay tuned as we continue to report on the GMUG Land Management Revision Process and in the meantime you can learn more about the GMUG here. (Photo of Josh King by Nick Spitzer)
It's that time of year folks! Colorado Event Season is soon upon us. Whether you've been training all winter in preparation or whether you just enjoy a good show and boating with your friends, these classic Colorado river events are not to miss!
In addition to the many whitewater festivals that American Whitewater partners with in Colorado, we are excited to announce that AW is hosting Gore Fest again this year! We hope to see you at Rancho Del Rio on August 24 - 26. Stay tuned for more details on race registration, entertainment, and volunteer opportunities.
ARKANSAS RIVER, Colo. - The Arkansas Headwaters Recreation Area (AHRA) is revising their Management Plan for the first time since 2001. The new Draft Plan was made publicly available in October and the AHRA is accepting public comments through November 10, 2017 (next week!). In order to design effective and productive comments, American Whitewater has thoroughly reviewed the Draft Plan, discussed the Plan with our local Affiliate Clubs, attended AHRA Public Open Houses, and reached out to key members of the local paddling community. To make it easy for you to SUBMIT YOUR COMMENTS, American Whitewater staff have compiled our key concerns and comments for your review.
Gunnison, Colorado - Last Wednesday, Matt Brown - longtime river guide, adventurer, and pillar of the Gunnison Valley community- passed away tragically after an accident in Moab. Matt was so much to so many. At the request of his family and friends, contributions in Matt's memory can be made to American Whitewater’s River Access work in Colorado. Matt was a strong ally and advisor in our work to protect the public’s rights to float and fish in the State. We miss him immensely.
Kremmling, Colorado - The Bureau of Land Management has released for public review and comment a set of preliminary alternatives for managing about 40 miles of the Upper Colorado River between Parshall and State Bridge - including Gore Canyon and Pumphouse. This is your chance to weigh in on whether there should be a day-use permit; a camping permit with designated campsites in the popular stretch between Pumphouse and State Bridge; and expanding the developed Pumphouse Campground.
Bond, Colorado - American Whitewater is presenting Gore Canyon Festival - August 25-27th 2017. Online registration is open and there are events for everyone, so sign up today!
On Sunday, nearly 50 people gathered on the banks of the St. Vrain River to pick up trash from the water and the shoreline. We started the day off with Hotbox Roasters coffee and donuts, and a few words about River Stewardship – the common cause that brought us all together. We found bedframes, rusty nails, lawn chairs, car doors, plastic water bottles, candy wrappers, fast food containers, and it doesn’t stop there. Our findings are likely a combination of leftover debris from the floods, illegal waste dumping along the river, and built up trash from years of careless passers-by. Thank you to all those that came out for the river cleanup! American Whitewater depends on our affiliate clubs, members, and dedicated volunteers in order to tackle our many River Stewardship projects.
Cortez, Colorado - Last week, American Whitewater met with local water managers, fisheries biologists, an other interests in Dolores River water, to start negotiating releases from McPhee Dam - like we do every spring. This year, things are looking very good for the Dolores...
Dotsero, Colorado - A key river access point on the Upper Colorado river, once threatened with closure, has now been permanently protected through a partnership between BLM and Eagle County.
There is only one more day left to share what you value most in the Browns Canyon National Monument planning area! The Bureau of Land Management, U.S Forest Service, and Colorado Parks and Wildlife are working together to develop a Coordinated Management Plan for Browns Canyon National Monument. In order to design a plan that most benefits citizens and visitors of Colorado, the agencies designed an Online Survey and Mapping Tool to understand how the public interacts with the Browns Canyon planning area and what aspects of the area are most important to the public.
Colorado - American Whitewater has released a new study on whitewater recreation in the San Miguel River Basin. The Colorado Water Conservation Board (CWCB) requested that Montrose County consult with American Whitewater on recreational needs and future impacts for the San Miguel River. Montrose County acquired conditional water rights to the San Miguel River in hopes of building multiple new reservoirs on BLM land. American Whitewater worked with Montrose County’s agents to assess the impact its conditional storage proposals would have on existing recreational opportunities.
A new proposal to allow the development of a 90- acre open pit mine in Eagle County at the gateway to the Colorado River has local river users asking questions. We encourage everyone to attend an Open House December 6 at 6 PM at the Gypsum Recreation Center, and to make your voices heard at the Town Council meeting where they will discuss the application on December 13 at 7 PM.
Lyons, Colorado - For the second year in a row, Oskar Blues Brewery is hosting the Burning Can Festival at this year Lyons Outdoor Games. Burning Can, which takes place under the backdrop of Rocky Mountain National Park and the St. Vrain River, is a celebration of good beer, served in a can. This year, All money raised from Lyons Outdoor Games recycled cans will be donated to American Whitewater. See you there!
Colorado - American Whitewater is conducting a study of flow-recreation relationships for the Yampa Basin, and identifying specific metrics for use in the Watershed Flow Evaluation Tool. This study is intended to inform local, state, and federal planning efforts as to the full range and quality of recreational boating opportunities for the Wild and Scenic suitable Yampa River, as well as the Elk and White Rivers, and their tributaries. Your participation in the flow survey is requested.
Colorado - On December 23, Governor Bill Ritter issued a report outlining a series of proposals for resolving disputes between landowners and rafters in Colorado. He also signed an executive order creating the River Access Mediation Commission to provide a way for some of the most contentious conflicts between boaters and property owners to be addressed. The Governor’s River Access Dispute Resolution Task Force was a 17-member group created in July of 2010 to help craft ways to sort out conflicts on Colorado rivers on a stretch-by-stretch basis as those disputes arise.
Colorado - Last month, the Bureau of Land Management (BLM) released their proposed management plan for the Little Snake Resource Area, encompassing over a million acres of soaring plateaus, wild and scenic rivers, and sweeping sagebrush basins. Special interests are trying to overturn the Bureau of Land Management’s plans to protect portions of the Yampa River – one of the nation's last free flowing rivers. Let BLM know that protections for these rivers are important to you!
Log into the American Whitewater website and you can contribute to river descriptions, flow and access tips, and maps associated with runs you've done. You can even add new runs to the inventory!
