Races Half marathon · Littleton, USA
Platte River Half Marathon
Platte River Half Marathon is a flat half marathon in Littleton, USA, held each April. An out-and-back along the Platte River Trail from the Reynolds Landing trailhead, passing through Littleton, Englewood, Sheridan and Denver. Total climbing is about 90 m, so the course stays close to level. Early spring mornings along the river are usually cool, roughly 0 to 12°C at the 07:00 start, but late snow or wind is possible. Flat courses like Littleton's reward metronomic pacing — the danger is going out faster than goal pace because it feels cheap early.
Page rebuilt 2026-11-14 · race facts not independently verified — confirm dates and entries on the official race site
When
April
next: Sunday 11 April 2027
Course
flat
Half marathon
Conditions
Early spring mornings along the river are usually cool, roughly 0 to 12°C at the 07:00 start, but late snow or wind is possible.
Racing this course well
An out-and-back along the Platte River Trail from the Reynolds Landing trailhead, passing through Littleton, Englewood, Sheridan and Denver. Total climbing is about 90 m, so the course stays close to level.
Flat courses like Littleton's reward metronomic pacing — the danger is going out faster than goal pace because it feels cheap early.
Getting a place
- How you get in
- Open entry: first come, first served
- Price
- $102.12 including fees, rising after 31 December 2026 (2027 race)
Official Platte River Half Marathon site →Checked November 2026
Race day
- Next race
- Sunday 11 April 2027
- Start time
- 07:00
- Also on the day
- 5k, half-marathon relay
The course in numbers
- Layout
- Out-and-back
- Total climb
- 90 m (300 ft)
Worth knowing
- The organiser calls it the oldest half marathon and relay race in the Denver area.
- The 2026 race doubled as the RRCA Colorado State Half Marathon Championship.
- The finish area is beside Breckenridge Brewery, which hosts the post-race party.
Pick your goal for Littleton
Pace charts, weekly structure and timelines for the most common half marathon goals:
The date shown is the one the organiser has announced. Change it if yours differs.
Build your training around Platte River Half Marathon.
RunV works backwards from race day to today. Your plan adapts when life interrupts, and you approve every change. It does not adapt to this specific course — the pacing guidance above is where the course knowledge is.
Everything above stays free and complete — this is an optional next step, not a paywall.
Asked often
- When is the Platte River Half Marathon?
- The next Platte River Half Marathon is on Sunday 11 April 2027 in Littleton, USA. It is held each April.
- Is the Platte River Half Marathon course flat?
- An out-and-back along the Platte River Trail from the Reynolds Landing trailhead, passing through Littleton, Englewood, Sheridan and Denver. Total climbing is about 90 m, so the course stays close to level.
- How do I enter the Platte River Half Marathon?
- Open entry: first come, first served. Price: $102.12 including fees, rising after 31 December 2026 (2027 race).
- How should I train for the Platte River Half Marathon?
- Match your preparation to Platte River Half Marathon's profile and the April weather, then protect consistency — with RunV Premium you can adapt your plan to fit your week, so one bad week never derails the block.
Not sure what to target? Predict your half marathon time from a recent race →
More half marathon races
Supplements research for this distance
Build for Littleton — around your actual life
RunV engineers your block backwards from race day in April — and adapts it when training doesn't go to script. You approve every change.
