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From Lolo National Forest: A segment of Cottonwood Lakes Road NFSR 477 at mile marker 19 over Dunham Creek will be closed Sept 16– Oct 12. for a bridge replacement.  Cottonwood Lakes Road will be closed to the southeast from the intersection with Dunham Creek Road NFSR 4388 for approximately a quarter of a mile.

The USFS recommended detour is to leave route at SB mi. 9.6, ride 3.3 mi. S. on Lower Cottonwood Rd./FR 9976 to Kozy Corner, then 8.5 mi. east and south on Woodworth Rd. to SR 200, then 6.7 mi. E. to main route intersection at SR 200 and Monture Creek Rd.

Here is a visual of the area in question. Purple is the closure area, green is the recommended detour.

And here is a Ride With GPS map link to the detour:

Nathan Taylor
Routes and Mapping

From NPS: A number of large scale projects will force the closure of the Green River ferry (EB mile 30.5) and ~2 mi. of Green River Ferry Rd. N of the river from July 29 - November 15, 2019. Work will include extending the vehicle ramp, improving the ferry boat and creating canoe/kayak river access upstream of the ferry. See for more info.

NPS has posted a detour that is 29 mi. long and skirts the perimeter of Mammoth Cave NP almost entirely: Note this map also shows the full closure area in detail.

Here is a Ride With GPS map of the same detour, going EB:

There are some services along the detour, notably near the SR 728/SR 1827 intersection in the north, and the town of Brownsville in the southwest.

ACA Routes and Mapping

The Nethker Fire ( has closed the Bear Pete Trail #142 along the Secesh Singletrack Option. According to their Facebook page (, Burgdorf Hot Springs is also closed until further notice.

Warren Wagon Rd./SR 21 remains open, so the CCW detour is thus: At turn L (mi. 31.9), near Ruby Meadows TH, turn left onto paved Warren Wagon Rd./FR 21 and follow 6.4 mi. SW over Secesh Summit to rejoin the route at turn O (mi. 60.6). But keep in mind that conditions are changing and Warren Wagon Rd./FR 21 status as open is in flux. It is recommended to check the inciweb link above for current status before riding this detour.

Attached is a map of the detour and affected area. Note that red is the trail closure, green is the detour and yellow X is fire location.

ACA Routes and Mapping

The main Rattlesnake Trail, East Fork Rattlesnake Trail #514, and Sheep Mountain Trail #513 in Lolo NF are all closed due to the Beeskove Fire which is burning in steep terrain directly above the route near SB mile 54.3, about 1.7 mi. S of Franklin Bridge. Here is info about the fire:

The SB detour is to leave the route at turn M (mi 39.3), and follow Gold Creek Rd./FR 126 3.5 mi. S to SR 200, and then follow SR 200 16.3 mi. W into Missoula. Here is a map of said detour: Just reverse for NB.

Nathan Taylor
ACA Routes and Mapping

From Sublette County Emergency Management Facebook page:

30 July 2019 at 1415 hrs

Union Pass Road Closure for Bridge Replacement Project
Pinedale, Wyo., July 30, 2019 –

The Bridger-Teton National Forest will close a short section of the Union Pass Road (FS 600) from July 31 through August 21, 2019 in order to remove and replace the current bridge over Tosi Creek, which has been determined to be deficient. The Tosi Creek bridge replacement project is located north of Pinedale. It is approximately 7 miles north of the forest boundary at the end of State Highway 352, and approximately 3.5 miles northwest of the Kendall bridge.

This closure was previously unexpected, but is necessary for public and worker safety during bridge replacement. Union Pass Road is a popular route between Dubois, Wyoming and Cora, Wyoming over Union Pass. This closure will affect through traffic along this route, and will also prevent travelers coming from the Dubois side from refueling in Cora. Contractors will make every effort to shorten the closure duration, however it is likely that all three weeks will be needed for this closure. Travelers are urged to be familiar with the location of this closure and to be prepared with plenty of fuel, water, and a map.

Please contact the Pinedale Ranger District at 307-367-4326 for updates on this project, or if you have questions regarding this project or closure.

This closure is at GD SB mile 108.2, due south of the intersection of FR 600 and FR 660, and 3.4 mi N of Kendall Guard Station. I've spoken to the Pinedale Ranger District, and the ranger there said that cyclists can pass through on the road between 7pm-7am during work off-hours. He also said that anytime, even during construction hours, riders can walk bikes down to the creek and ford on foot. The ranger stated that this was not a difficult ford. Note that there are no easy detours, as this area is sandwiched between 2 federal wilderness areas and along a big river with few bridges. If we do catch wind of a workaround, I will post it here.

Here are links to closure postings:

Nathan Taylor
ACA Routes and Mapping

From Tony Mason of Fort Collins CO:
Update on Idaho Hot Springs Loop washout on FR 227 We traveled going west on FR 227 July 14, 2019. The first bypass begins 0.3 miles west of Browns campground/Smokey Bar. Hike a bike for 0.3 miles along the south river bank on rough trail cut into the willows. We had to go back and get the BOB trailer after hiking the bikes. Continue west on FR 227 for 1 mile crossing the river on the bridge. The second bypass is a 200 meter rocky hike a bike along the north river bank. We were able to keep the BOB trailer attached for this short section. The remainder of FR 227 is in good condition. I do not think the washout will impose much of a problem to cyclist traveling the route this season.

Note there are several cyclist reports describing the situation along this road. Among them are these:

Takeaway for now is that the road is passable, slow but passable, even with a BOB.


From Coldspring local Susan Butler:

"Texas State Hwy 150 between Punkin and Coldspring is currently under construction. On, it gives an expected completion date of 7/31/2019, which isn't going to happen! They are way behind. I have planned two alternative routes on One is named "Hwy 150 Alternate" and is suitable for hybrid and mountain bike tires only as it uses forest service roads. It is also very remote, but beautiful; it meanders through the National Forest.

The other route is named "Hwy 150 Construction Bypass", and follows paved roads. I will warn you, though, that the intersection of Hwy 150 and Hwy 1725 is fairly dangerous! Cyclists should approach that intersection with caution.

Road tires CANNOT ride on the section of the road currently under construction. The road is torn up and is even very bumpy to drive on (and I have a 4WD truck)! Thanks!"

Nathan Taylor
ACA Routes & Mapping

East of Rawlins, a 6-mile stretch of I-80 between Walcott Junction and Sinclair is under construction through Oct 2019. Traffic is reduced to 2 single, head-to-head lanes, with speeds of 65 mph. These made for nervous conditions for cyclists recently. Exercise caution along this stretch.

For info and status reports:

No easy detours exists through this area. Cyclists who can handle unpaved roads could depart the TransAm south of Walcott Junction at Riverside, and head west on SR 70 up into Medicine Bow National Forest, crossing the divide at Battle Pass, and then north on (mostly) unpaved Sage Creek Rd. into Rawlins. This detour is 78.5 miles long (compared to 58.8 mi on TA), includes steep climbing on sometimes narrow mountain highways and about 45 miles of gravel/dirt surfaces, no services except camping, and a visit to the famed Aspen Alley. Here is the route:

Nathan Taylor
ACA Cartographer

There are currently several road closures due to flooding in the Arkansas River Valley and tributaries on the South and Central Loops. The route between Dardanelle and Conway in particular has at least 4 road closures, including the Arkansas River bridge on SR 60 at the Perry/Faulkner County line near Toad Suck. No detours have been posted. The conditions are changing rapidly, so be sure to check the below links for status:

Nathan Taylor
ACA Cartographer

US 95 in Idaho is undergoing multiple construction projects at various locations along the TA Sec03 route. Here is a link to ITD projects and info:

A brief overview-
Map #28: Between Race Creek Road (near Riggins) and Slate Creek Road (13 miles north of the Riggins area). The road is being repaved. There is work on the shoulder. The roadway is reduced to one lane. Expect delays. Look out for flaggers. Expect 15 - minute delays. Until July 31, 2019 at about 8:00PM MDT.

Map #27: Between Smokey Boulder Road and Hazard Creek Road (12 miles north of the New Meadows area). Bridge construction work is in progress. The roadway is reduced to one lane. There is a width limit in effect. Width limit 14'0". Until November 18, 2019 at about 11:59PM MDT.

Map #26: Between East Fork Road and Old Highway (8 miles north of the Council area). Bridge construction work is in progress. The roadway is reduced to one lane. Look out for flaggers. Look out for temporary traffic lights. There is a width limit in effect. Speed restrictions are in force. Width limit 12'0". Speed limit 35 MPH. Until November 1, 2019 at about 7:00PM MDT. *Note that the unpaved Weiser River Trail from Cambridge to Tamarack is a detour option around this project. See for more info.

Make sure to plan accordingly as travel along this stretch will be slow all summer. Check the ITD link for status updates, and feel free to post here any new info.

Nathan Taylor
ACA Cartographer

The Mississippi River Trail is temporarily closed directly upriver from Norco due to opening of the Bonnet Carre Spillway to accommodate rising river levels.

The suggested detour (using ST 05 narrative and mileages) begins at SB turn G 25(40): instead of turning right onto River Rd., continue straight on SR 628 (which has decent shoulders) 2.6 mi. N to US 61. Turn right onto US 61 (also good shoulders) and follow 2.2 mi. E to  Apple St./SR 48. Turn right onto Apple St./SR 48 and follow 1.4 mi. S back to River Rd. and an access ramp to the levee trail. A Google map of the detour is here:

Locals have stressed that flooding may be a problem this year, so currently there is no timeline for the levee path to reopen. Check the below links for status updates:

Army COE Bonnet Carre Spillway website:

Spillway FB page:

Nathan Taylor
ACA Cartographer

CR ZZ in Wrightstown was closed 9/4/18 between High St. and Dock St. due to rising water on the Fox River.

The closure is weather dependent and could change at any time, but still closed as of 9/17/18. There is no detour posted but an option exists by skirting the tributary of Fox River from High St, to CR D, to E. New Rd. and Outagamie Rd. and back to CR ZZ further west. See this map for more details.

Nathan Taylor
Routes and Mapping

From WSDOT: Closure due to Boyds Fire on SR 20 from milepost 337 to milepost 342, Inchelium Rd to SR 395 - Barneys Jct. (intersection of US 395 & SR 20), beginning at 5:22 pm on August 11, 2018 until further notice. This location is west of Kettle Falls, on the west side of the Columbia River. No detour has been posted, and cyclists looking to cross the river must travel off route far to the north or south for any options.

The shortest option (EB) involves heading south on Inchelium Rd. to the ferry crossing between Inchelium and Gifford on the east side of the river, then taking SR 25 back north to Kettle Falls, as seen in this map: This detour is ~53 miles long. Take caution, as traffic may be fast, the roads windy, and limited shoulder space available on these roads that may not see much cyclist travel. Reverse the directions for WB. There are limited services in both Inchelium and Gifford, and an NPS campground in Gifford:

Here is the website for the ferry:

Barring the ferry, a northern option involves riding US 395 and Northport Flat Creek Rd. to Northport, then returning on SR 25: a detour of over 65 miles.

Here is the Boyds Fire Information Center phone number 509-481-7064. There doesn't seem to be incident website that is being maintained at this time.

If anyone else has info about getting around this closure and across the river, I implore you to share it here. Thanks!

Nathan Taylor
ACA Cartographer

We have received a couple rider reports of the Elk Valley Trail dead-ending at a gravel pit about 4 miles north of Hosmer, BC. We are awaiting a response from local contacts but in the meantime we do not know if the obstacle is temporary or will become a long-term issue. This post will be updated when we receive more information. The suggested detour is to ride PR 3 between Sparwood and Hosmer.

Attached is a screenshot showing the location of the obstacle.

Nathan Taylor
ACA Cartographer

SR 21 is closed 0.5 mi. E. of Augusta due to a washed out bridge. The workaround is to eliminate the jog NW on US 287 to Augusta, then E on SR 21 back to SR 200 at Simms. This will mean missing the services that are available in Augusta, so be prepared for a stretch of no services between Lincoln and Simms (limited services). SR 200 between US 287 and Simms is very scenic, rolling terrain through the Rocky Mountain Front, but shoulders are variable with some poorly placed rumble strips. Traffic is fast but generally light.

Nathan Taylor
ACA Cartographer

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