Walk the paved stretch of Bear Creek Trail near S. Kipling Parkway right now and you will hit orange construction fencing that was not there in July. The City of Lakewood started the final phase of its multi-year Bear Creek Trail improvement project on Monday, August 14, and posted signage estimating roughly six weeks of work, weather dependent, on the segment between Kipling Parkway and Kipling Street. If you use this trail on a normal week, whether that means a dog walk after dinner, a training loop before work, or the bike commute toward Morrison, you already know the detour is real.

What most people walking past that fencing have not done is put it on the same calendar as October 3 and 4. That weekend, Bear Creek Lake Park hosts The Bear Chase, the Aravaipa Running festival that turns the Big Soda Lake Beach area into a start and finish line for six race distances. The two events are supposed to be sequential: construction wraps, then the park hosts its biggest weekend of the year. Run the dates and the gap between them is eight days. Given how this exact project has behaved so far in 2026, eight days is thinner than it looks.

The Detour That Started August 14

This has not been a one-and-done closure. The Bear Creek Trail project has moved through the park in stages all year: Phase 1 concrete work ran January 6 to 17, Phase 3 repairs ran February 19 to March 5, and Phase 4, between S. Kipling Street and S. Estes Street, was originally targeted for early completion until a pair of nesting owls moved into the corridor and halted work under federal raptor protection rules. That phase did not fully reopen until May 26, and even then the city flagged a final concrete segment, about 600 feet east of the Kipling Street pedestrian bridge, that needed roughly three more weeks of work using a temporary soft-surface detour.

Now comes the phase the city is calling final: Kipling Parkway to Kipling Street, started August 14, budgeted at six weeks. Do the arithmetic and that lands the estimated reopening around September 25. The project is being funded in part through the Jefferson County Parks and Open Space Trails Partnership Program, and it earned a 2025 Colorado Lottery Starburst Award, which tells you this is a well-resourced, well-tracked build. It does not tell you the schedule will hold. Every phase so far this year has been labeled weather dependent, and one phase already slipped by weeks because of wildlife, not weather. If you are the kind of resident who plans a weekly loop around this trail, the honest read is that late September is an estimate, not a guarantee.

The Race That Turns the Beach Into a Starting Line

The Bear Chase is not a single morning fun run. It is a two-day festival built around six distances at Bear Creek Lake Park's Big Soda Lake Beach: Saturday, October 3, covers the 100K and 50 Mile in a 4:30 to 6:30 a.m. window followed by the 50K from 6:30 to 7:30 a.m., and Sunday, October 4, covers the Half Marathon from 6:00 to 7:00 a.m., the 10K from 7:00 to 8:00 a.m., and the 5K from 7:30 to 8:30 a.m. Elevation gain scales with distance, from roughly 230 feet on the Baby Bear 10K up to about 4,250 feet on the 100K, and the courses run almost entirely on the park's dirt and single-track trails rather than pavement.

Packet pickup happens the Friday before, October 2, from 5:00 to 7:00 p.m. at Runners Roost in Lakewood, 7978 W. Alameda. That detail matters if you are not racing but live nearby and are wondering why the parking lot near Alameda is unusually full on a Friday evening in early October.

The part that catches casual park visitors off guard is the pass policy. Crew, spectators, and pacers get complimentary entry before the race starts, but once racing begins, anyone entering the park needs a daily or annual park pass, the same one required of any Bear Creek Lake Park visitor on a normal day. If your usual weekend plan is to swing by the swim beach or the marina without a pass because you have never needed one, race weekend is the exception.

The event has run since 2010, and its history includes its own reminder that this park does not always cooperate with a schedule. In 2013, heavy rain flooded the park badly enough that the original start and finish line sat under roughly 50 feet of water, forcing organizers onto a flatter, more paved alternate loop for that year only. The race director, David Manthey, built the 50 Mile course around a 12.5-mile training loop he had already been running through the park for years, which is part of why the course reads as a genuine local's route rather than a generic ultramarathon layout.

The Eight-Day Buffer

Here is the math that turns two separate calendar entries into one planning problem. The final construction phase started August 14 and carries a roughly six-week estimate, which lands the projected reopening around September 25. The Bear Chase runs October 3 and 4. That leaves eight days between the construction estimate and race weekend.

Eight days is not zero, but it is not much slack for a project that has already needed weeks of extra time once this year because of nesting owls, and that has been labeled weather dependent at every single phase. A stretch of early autumn rain, a supply delay, or another unplanned pause of even a week would push the reopening into the same window as hundreds of runners, plus their crews and spectators, converging on the same park. Nobody is predicting that will happen. But if you live near this park and you are the kind of person who plans your week around it, the honest posture is to treat late September as tentative rather than settled, and to check current status before assuming the detour is gone.

What Actually Stays Open

It helps to remember how much of this park is not touched by any of this. Bear Creek Lake Park covers 2,624 acres and includes roughly 15 miles of multi-use dirt trails beyond the paved Bear Creek Trail corridor, including the 6.5-mile Mt Carbon Loop, which sits away from the Kipling Parkway to Kipling Street construction zone. The archery range, the swim beach at Big Soda Lake, the marina, and the campground all operate on their normal seasonal schedules outside of race weekend itself. The park draws over half a million visits a year, and the vast majority of that traffic never touches the segment currently under construction.

How to Actually Plan Around It

• Before a weekday walk or ride on Bear Creek Trail near Kipling Parkway, check the city's current closures and advisories page rather than assuming the six-week estimate has held.
• If you want to avoid both disruptions entirely, shift toward the Mt Carbon Loop, away from the Kipling corridor and away from the Big Soda Lake race hub.
• If you are visiting the park on October 3 or 4 without racing, bring a daily park pass. The complimentary entry only applies before the race begins.
• If you are training for your own long run this fall, avoid early Saturday and Sunday morning windows October 3 and 4 near Big Soda Lake Beach, when the course loops are active from before dawn through mid-morning.
• If the detour signage is still up in early October, do not assume it is a sign the race got rerouted. Confirm directly through the race organizer or the city rather than guessing.

None of this changes what makes Bear Creek Lake Park worth using in the first place. It changes when and how you use it for the next six to eight weeks, and that is the kind of detail that only shows up if you are actually paying attention to this specific park rather than reading a general description of it.

If you are the kind of person who tracks a neighborhood this closely, from trail conditions to construction timelines, that instinct tends to carry over well when the time comes to buy or sell here. Anna & Trevor Sholders at DreamSpace work Lakewood and the rest of the Front Range with that same level of attention. If Lakewood's parks and trail network are part of why you love living here, or part of what you are trying to explain to someone thinking about moving nearby, they are glad to talk it through. You can find more on what makes this part of Lakewood work day to day on the Lakewood neighborhood page, or reach out directly to schedule a free consultation whenever the conversation turns from trail closures to real estate.