Drivers across Whatcom County should expect to share the road with roughly 800 cyclists on Saturday, July 18, 2026, as the annual Tour de Whatcom bicycle event takes over county roads from 7:30 a.m. to 5:00 p.m. The event routes pass through Bellingham, Lake Samish, Sudden Valley, Lynden, Birch Bay, and Ferndale, covering stretches of secondary county roads from the Alger area all the way to the Canadian border communities in the north.
Whatcom County Public Works has posted a reminder asking all drivers to slow down and watch carefully for cyclists throughout the day. With 800 riders spread across multiple routes ranging from 22 to 100 miles, cyclists will be visible on a wide variety of roads at different points throughout the day, making it difficult to predict exactly where groups will be at any given time.
Where Cyclists Will Be Riding
The Tour de Whatcom is one of the county's most established cycling events, drawing participants from across the Pacific Northwest for a chance to ride through some of Western Washington's most scenic terrain. Route options span from a shorter 22-mile option for newer or casual cyclists up to a demanding 100-mile century ride. All routes originate in downtown Bellingham before fanning out across the county's road network.
Riders heading south from Bellingham will pass through the Lake Samish corridor along Samish Way and Old Samish Road, a winding stretch that can be particularly narrow in sections. The route also threads through Sudden Valley, the private residential community set in the hills between Bellingham and Lake Whatcom, before heading north through Lynden's flat farm roads and then looping west toward Birch Bay and Ferndale.
Full route maps for all distance options are available through the Tour de Whatcom route map page, which Whatcom County Public Works has shared as a resource for both cyclists and drivers wanting to anticipate where the heaviest traffic will occur during the event.
What Drivers Should Know
County roads in Whatcom County are generally two-lane rural routes without dedicated cycling infrastructure, meaning cyclists and motor vehicles will be sharing the same lane in many stretches. Washington State law requires drivers to give cyclists at least three feet of clearance when passing, and on narrow rural roads that often means slowing significantly before safely passing a group of riders.
Drivers should be especially alert in the early morning hours between 7:30 and 10:00 a.m., when the largest groups of riders are typically still bunched together near the start of the event. By midday and into the afternoon, the field will have spread out considerably, but riders on the longer century route will still be on the roads well into the afternoon.
Residents of Sudden Valley, Lynden, and Birch Bay who need to leave or return home during the event should plan extra travel time and be prepared for brief waits behind rider groups on particularly narrow road sections. Cyclists in organized events are legally permitted on public roads, and county emergency access will remain available throughout the day.
This year the Tour de Whatcom coincides with planned overnight I-5 lane closures that begin the following evening. Whatcom County Public Works has confirmed that southbound I-5 between Northwest Avenue and the Guide Meridian will drop to one lane starting Sunday night, July 19, through Tuesday night, July 21, from 10 p.m. to 5 a.m., as crews repave that stretch. The on-ramp from Meridian Street to I-5 southbound will also close during those overnight windows. Drivers who normally use that interchange for late-night or early-morning travel should plan alternate routes for those three nights.
A Long-Running County Tradition
The Tour de Whatcom has been bringing cyclists to county roads for many years, making it one of the signature cycling events in the region. The event celebrates Whatcom County's diverse terrain, from the flat agricultural lowlands around Lynden to the steeper forested climbs near Lake Samish and the coastal approach to Birch Bay State Park.
For cycling enthusiasts who didn't register in time for this year's event, watching the peloton pass through your neighborhood is its own spectacle. The sight of hundreds of riders moving in formation across Whatcom County's farm roads is a memorable part of the county's summer calendar.
Drivers and residents can find the full route maps and event details at the official Tour de Whatcom route page. For updates on road conditions and other county infrastructure news, visit the Whatcom County Public Works page. For related Whatcom County road and outdoor event coverage, check out this earlier look at outdoor destinations in the county.
