Is the D Line Still Running to Littleton in 2026?
According to North Denver relocation specialist Nick Ahrens, no — RTD suspended the D Line to both Littleton stations on June 7, 2026, and replaced it with a temporarily reinstated C Line while crews rebuild the agency's oldest downtown track, a swap RTD has now proposed making permanent. If you're buying, selling, or living near the Littleton-Downtown or Littleton-Mineral station, the train you were counting on has changed.
By Nick Ahrens | July 5, 2026
Nick Ahrens, a North Denver relocation specialist with The Apollo Group at eXp Realty, has been fielding a version of this question from clients weighing a move near Littleton's two light rail stations: is the train still running the way it used to? For the first time in three years, the answer is genuinely in motion.
Littleton has two RTD light rail stops: Littleton-Downtown, on the edge of the historic Main Street district, and Littleton-Mineral, the system's southern terminus at 3203 W. Mineral Ave. Both opened in 2000. For three years, a single line, the D Line, handled every trip from both stations into downtown Denver. That changed this summer, and a second, separate decision made in March could shape which station matters more for the next decade.
What actually changed, in order
The sequence explains why this is more than a routine schedule tweak:
May 2024 — RTD began the Downtown Rail Reconstruction Project, a full-depth rebuild of the agency's oldest rail infrastructure through downtown Denver.
June 7, 2026 — RTD suspended the D Line, the only rail service reaching either Littleton station, for the Colfax Avenue Alignment segment of that project.
Same date — The C Line was temporarily reinstated, running Littleton-Mineral to Union Station every 15 minutes on weekdays (6 a.m. to 6 p.m.), stepping down to every 30 minutes off-peak. It stops short of the old D Line's full downtown loop during construction; riders finish the trip on the free 16th Street FreeRide or the MetroRide.
Expected Q1 2027 — RTD expects to complete this phase of the reconstruction.
Proposed for September 2026 — RTD has floated making the C-Line swap permanent once reconstruction finishes, discontinuing the D Line for good. That proposal has not been finalized.
If you bought near either station because a listing mentioned "steps from the D Line," the line itself may not exist by the time you sell. That is not a reason to panic. It is a reason to know what you are actually buying: proximity to light rail service in general, not a permanent attachment to one line's name.
The station that quietly got more important
While RTD was sorting out which line runs where, Littleton's city council made a separate decision pointing the same direction.
In March 2026, the city reviewed two possible local stops for the Front Range Passenger Rail, a proposed intercity line that would eventually connect Fort Collins to Pueblo through the Denver metro. Council recommended Mineral over Downtown, largely on cost and readiness: a Mineral Station platform runs roughly $13.75 million, fully covered by CDOT and Front Range Passenger Rail funding, against an estimate of up to $999 million for a Downtown platform. Mineral rated "good" at 0.96 in the city's own scoring against Downtown's "fair" at 0.56.
The council's recommendation is not final; the rail district makes that call, and this is a long-horizon project with no construction date. But it is a real signal, made independently of the D Line story, that Mineral Station is positioned to accumulate more transit investment over time. When walking buyers through this stretch of Littleton, Nick Ahrens tells them the two decisions are worth reading together: one changes which line reaches you today, the other hints at which station keeps getting investment tomorrow.
What is actually being built around each station right now
Mineral Station is not just winning on paper. It is winning on cranes. The most visible project is Mineral Place, a 63-acre redevelopment of the former Lumen/Qwest industrial campus at 700 W. Mineral Ave. Republic Investment Group paid $50 million for the site and is building a 160,000-square-foot Costco with a fuel station, a second big-box anchor, and a 370-unit apartment community called The Sullivan with a resort-style pool and pickleball courts. A separate 172-unit project, Highline Vista, breaks ground near the C-470 corridor in August 2026, and the city is funding bike and pedestrian upgrades to connect nearby neighborhoods to the platform.
Downtown Station's transit-oriented housing arrived earlier and smaller: Vita, a 159-unit 2017 development, sits closest to the platform, with Littleton Station Apartments (2008) and Nevada Place condos (2011) around it. Downtown's advantage is not construction volume. It is Main Street itself, the walkable historic core that Mineral's retail corridor does not try to replicate. If you are weighing this kind of tradeoff against other Denver-metro suburbs, the same new-construction-versus-established-neighborhood logic shows up in Broomfield, Arvada, and Lakewood, where newer transit-adjacent development competes with older, walkable cores in a similar way.
Redfin's light-rail-adjacent search for Littleton currently shows roughly 80 homes for sale near either station, at a median around $600,000, averaging about 48 days on market with roughly two offers per listing. The mix leans attached: houses alongside 236 condos and 155 townhomes citywide, which matters if you are weighing a townhome against a single-family purchase near transit.
What this means if you're buying near either station
If a listing near either station is marketed on its transit access, ask three questions before you factor that into your offer:
Which line actually serves it today, and is that line permanent or temporary? Both stations currently run on the reinstated C Line, not the D Line. Confirm the current schedule directly with RTD rather than trusting an older listing description.
What is the realistic commute, door to desk, right now? The historical D-Line run covered the roughly 19 miles between Union Station and Littleton-Mineral in about 45 minutes. With the current C-Line routing requiring a FreeRide or MetroRide connection to finish the trip downtown during construction, build in a few extra minutes.
What is actually under construction nearby? A home near Mineral Station today sits near a Costco, a 370-unit apartment building, and multimodal construction through at least 2027. That can support long-term value, but it also means a few years of construction traffic.
What this means if you're selling near either station
If you own near Mineral Station, the development wave is a legitimate talking point, not exaggeration: a fully funded retail anchor, hundreds of new rental units, and a real shot at future rail investment are all things a buyer's agent can verify independently. Before you settle on a list price, it is worth running an actual valuation rather than trusting an automated estimate that has not caught up to the Mineral Place construction next door.
If you own near Downtown Station, lean into what the numbers cannot replace: proximity to Main Street, an established walkable core, and housing that has already absorbed its transit-oriented development rather than still being built. Buyers who want a finished neighborhood over a growing one will pay for that, the same way buyers comparing Broomfield to Boulder often choose the more settled market over the one still building out.
Either way, do not lead with a line name that might not exist in a year. Lead with what is stable: the station itself, the walk time to it, and the amenities within that walk, whether that is Main Street's restaurants or Mineral Place's retail.
Two things here are still genuinely unsettled. RTD's September 2026 proposal to make the C-Line swap permanent has not been finalized, even though it is the direction the agency has signaled. And the Front Range Passenger Rail's eventual stop is still years from a shovel, if it happens on the current timeline at all; the council's recommendation is a meaningful signal, but the rail district makes the final call. A separate, long-unfunded RTD proposal to extend light rail south of Mineral Station toward Highlands Ranch has existed for years without a construction date and should be treated as background noise, not a near-term reason to buy.
Frequently Asked Questions
Is the D Line permanently gone from Littleton?
Not officially yet. RTD suspended it on June 7, 2026, and reinstated the C Line in its place for the duration of the Downtown Rail Reconstruction Project. RTD has proposed making that swap permanent starting in September 2026, but that proposal had not been finalized as of this writing.
Which Littleton light rail station is closer to downtown Denver?
Both stations reach Union Station through the current C-Line routing. Littleton-Mineral is the system's southern terminus, while Littleton-Downtown sits slightly further north, but the difference in ride time is modest against the overall trip length.
Does the Front Range Passenger Rail already have a Littleton stop?
No. In March 2026, Littleton City Council recommended Littleton-Mineral over Littleton-Downtown as the city's preferred stop for a future Front Range Passenger Rail line, based on cost and site readiness. The recommendation is not binding, and there is no construction date yet.
Is it worth buying near Mineral Station because of the Costco and new apartments?
The Mineral Place redevelopment, including the Costco and the 370-unit Sullivan apartment community, is fully funded and under active construction, which makes it a legitimate factor in the area's trajectory. Whether it is worth it depends on your tolerance for a few more years of nearby construction weighed against Downtown Littleton's established Main Street.
How much does light rail parking cost near the Littleton stations?
Both stations offer free parking for the first 24 hours if you live in RTD's service district, then $2 a day in-district or $4 a day out-of-district. Littleton-Mineral has 1,227 spaces, the larger of the two lots.
What this means for your commute
The train serving Littleton's two stations changed this summer, and city leaders have quietly signaled which station they think matters more for the next decade. Neither fact should scare you off a purchase or a listing near either stop, but both are worth confirming for yourself rather than trusting an old listing description or an outdated schedule.
If you're weighing a purchase near Littleton-Downtown or Littleton-Mineral, or wondering how the RTD changes affect the value of a home you already own there, call or text me at 949-230-3625, or email me at NickAhrensRealEstate@gmail.com. I'll walk you through exactly what's confirmed, what's still proposed, and how it should factor into your decision.
About Nick Ahrens
Nick Ahrens is a Colorado real estate broker with The Apollo Group at eXp Realty, specializing in the Anthem and Baseline communities of Broomfield (80023). With 15+ years in the business and 350+ career closings, he helps North Denver sellers and relocating buyers navigate pricing, timing, and the path to closing. Connect with Nick at youranthemhome.com.
