Drivers using U.S. 101 through Buellton need a new ramp map starting today. Caltrans said on July 29, 2026 that four full-time on and off ramps close beginning Wednesday, August 12, while other ramps on the same stretch reopen the same day.
The useful decision is local, not a full freeway shutdown. Stay on 101 if you are only passing through, but do not assume the State Route 246 or Avenue of Flags ramps you used last month still work.
- Starts: Wednesday, August 12, 2026, in Buellton, Santa Barbara County.
- Closes: Four named 101 ramps at SR 246 and Avenue of Flags.
- Reopens today: Santa Rosa ramps and the northbound McMurry on-ramp.
- Window: Closed ramps should return by early October 2026.
- Through traffic: Lane reductions on 101 remain; expect peak-hour delays.
Which ramps close, and which come back
Caltrans lists four full closures for the next stage. Northbound, the on-ramp at State Route 246 closes, and the off-ramp at McMurry Road, also called Avenue of Flags, closes.
Southbound, the off-ramp at State Route 246 closes, and the on-ramp at Avenue of Flags, also labeled Damassa Road, closes.
Those four names matter because they are the ramps people use for Solvang, the Santa Ynez Valley, and downtown Buellton. If your hotel, tasting room, or RV park sits on Highway 246, do not plan a last-second 101 exit at that interchange.
The same notice reopens other ramps on August 12. The northbound McMurry Road, Avenue of Flags, on-ramp comes back, and the northbound and southbound Santa Rosa Road ramps come back. That is the flip from the June stage, when Santa Rosa and a Damassa off-ramp were the closed set.
The Santa Barbara Independent reprint of the June 8 Caltrans notice recorded that earlier phase: one lane each way from Nojoqui Creek Bridge to just north of Avenue of Flags, Santa Rosa ramps closed about three months, and signed 246 detours. Today’s shift is the next card in the same 10-mile project, not a brand-new freeway job.
How the detour actually works
Caltrans says detour routes will move drivers between the State Route 246 interchange and the McMurry Road, Avenue of Flags, Damassa Road interchange. Use Avenue of Flags or McMurry Road to get back on 101 while the listed ramps stay closed.
That is a short city-street hop, not a 20-mile bypass. It still fails if you treat 246 like a hidden freeway ramp or if you follow an old maps pin that still shows the closed movement as open.
Write the three checks before you leave the hotel. First, name the ramp you actually need, northbound or southbound, 246 or Avenue of Flags. Second, if that ramp is on the closed list, follow the posted signs between those two interchanges instead of improvising through a parking lot. Third, check Caltrans QuickMap on the morning of a peak-hour trip, because lane reductions on the mainline stay in place even when a ramp reopens.
City of Solvang and City of Buellton both restated the same four-ramp list after the July 29 notice, which is useful confirmation that the local street grid, not only the freeway, is the detour.
If you are towing or driving a large RV, the city-street detour is the harder version of this story. A 101 through-trip can stay on the mainline. A 246 hotel arrival cannot.
Santa Rosa Road is the southern Buellton interchange. When those ramps were closed in June, drivers were told to use 246 instead. That instruction now reverses for anyone whose destination sits closer to Santa Rosa. Recheck the sign at the gore point rather than repeating last month’s habit.
Who this changes today
Solvang day-trippers coming up 101 from Santa Barbara or down 101 from the north are the first group. The 246 interchange is the usual cutover to Alisal Road and downtown Solvang. Losing the southbound 246 off-ramp and the northbound 246 on-ramp forces that group onto Avenue of Flags first.
Buellton guests are the second group. Avenue of Flags is the town’s main frontage, and the McMurry off-ramp is how many visitors drop into hotels, diners, and the Pea Soup Andersen’s cluster. That off-ramp is now closed. The matching northbound on-ramp is the one that reopens, so leaving town northbound is easier than arriving from the north.
Through traffic is the third group. Caltrans is not closing 101 itself. Current lane reductions remain, and the agency says to expect delays, especially at commute peaks. A June notice on the same project cited possible delays of about 10 minutes when the freeway dropped to one lane each way. Treat that as a planning buffer, not a guarantee that August traffic will match June.
Deep Arrival’s Buellton things-to-do guide is the right evergreen page if you are already staying in town and only need to change the last mile. It is not a substitute for the ramp list.
West Coast road-trippers using 101 as the spine between Santa Barbara and San Luis Obispo can keep the highway, then budget extra time through the Buellton work zone until the project finishes in March 2027.
What stays uncertain
Caltrans says the newly closed ramps should reopen by early October 2026. That is a target, not a clock you can book a tasting-room reservation against. Weather, night work, and the next reconstruction stage can move it.
The broader job is larger than four ramps. The same notices describe about 10 miles of 101 through Buellton, with shoulder work, concrete replacement, asphalt overlay, drainage, electrical upgrades, and guardrail work. The contractor is CalPortland Construction of Santa Maria. The July 29 notice prices the job at $30 million. The June Independent reprint used $29.8 million. Use either figure only as project scale, not as a traveler fee.
Lane reductions on the mainline remain during this stage. A reopened Santa Rosa ramp does not restore the old two-lane-each-way speed through town.
Do not treat a third-party maps app as the authority. The signed detour and QuickMap beat a cached pin.
QuickMap is the live Caltrans board for this corridor. Open it before a Friday afternoon wine-country return or a Monday morning northbound run, then look for US 101 through Buellton rather than a generic Santa Barbara County alert. A ramp can reopen while the mainline still runs reduced lanes.
| If you | What to do |
|---|---|
| Only need to stay on 101 through Buellton | Stay on the mainline, add time for remaining lane reductions, and skip closed ramps. |
| Need State Route 246 for Solvang or Santa Ynez | Do not use the closed 246 ramps. Follow the Avenue of Flags detour. |
| Need Avenue of Flags or McMurry from northbound 101 | The northbound McMurry off-ramp is closed. Use the signed city-street path. |
| Are leaving Buellton northbound | The northbound McMurry on-ramp reopens August 12. Confirm signs before you commit. |
| Drive this corridor often through October | Recheck QuickMap. Early October is the stated reopen target, not a promise. |
- Name the ramp: 246 and Avenue of Flags movements are not interchangeable this stage.
- Use the posted hop: Detours run between those two interchanges on city streets.
- Recheck through October: Closed ramps should return in early October; QuickMap is the live check.
Is U.S. 101 closed in Buellton?
No. Caltrans is shifting ramp closures and keeping mainline lane reductions. Through traffic stays on 101.
Which Buellton 101 ramps close on August 12?
The northbound 246 on-ramp, the northbound McMurry off-ramp, the southbound 246 off-ramp, and the southbound Avenue of Flags on-ramp.
When do the closed ramps reopen?
Caltrans says they should reopen by early October 2026. Confirm on QuickMap before you rely on that date.
What is the fastest way to Solvang during the closure?
Use the signed detour between Avenue of Flags and State Route 246, then continue on 246. Do not wait for a closed 246 ramp to reopen at the last minute.
