RMRR Fall Marathon Training Series #3 2026 — Thornton, CO
On September 27, 2026, the RMRR Fall Marathon Training Series #3 takes place in Thornton, Colorado at Riverdale Ballfields. This event offers two distances to support marathon preparation: a 10-mile option and a 20-mile option. The race starts at 7:00 AM, giving runners an early morning window for their training effort. Entry fees range from $20 to $40 depending on your chosen distance. Whether you're building endurance with the full 20 miles or looking for a solid tempo effort at 10 miles, this is part of a structured series designed for runners actively training toward marathon goals.
Course & Travel Notes
The race takes place at 5,430 feet elevation, so runners should expect thinner air and plan a slightly conservative early pace accordingly. Sunrise occurs at 6:52 AM, just before the 7:00 AM start, so be prepared for low-light conditions at the beginning. September weather in Thornton typically features highs around 82°F and lows near 49°F, with about a one-in-five chance of measurable rain on race day. Rocky Mountain Metropolitan Airport (BJC) is conveniently located 7.5 miles from the venue for easy travel logistics.
Hotels Near This Race
Find accommodation close to the start line in Thornton, CO. Sorted by distance from the race venue. Book early — race weekend hotels fill fast.
RMRR Fall Marathon Training Series #3 2026 — Thornton, CO
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Race Travel Insurance
Don't forget travel insurance for September 27.
You've trained for months and booked a trip to Thornton, CO. A pre-race injury, a delayed flight, or a family emergency can derail the whole thing. Travel insurance can help cover your race entry fee, hotel, and flights if you can't make it, and may cover medical costs if something goes wrong on the course. Plans typically only run 5-7% of your total trip cost — and running events are covered under standard plans with no additional coverage needed.
- Trip cancellation up to 100% of prepaid costs
- Running events covered under standard plans — no add-ons needed
- Trip interruption up to 150% of non-refundable costs
- Emergency medical up to $250,000
- Cancel For Any Reason add-on available
- 24/7 real-time support
Affiliate links — we may earn a commission at no cost to you. Coverage terms vary by state and plan. Review policy details before purchase.
Frequently Asked Questions
When is RMRR Fall Marathon Training Series #3 2026 — Thornton, CO?
RMRR Fall Marathon Training Series #3 2026 — Thornton, CO takes place on September 27, 2026. The race is held in Thornton, Colorado.
Where is RMRR Fall Marathon Training Series #3 2026 — Thornton, CO held?
RMRR Fall Marathon Training Series #3 2026 — Thornton, CO is held at 88th and Colorado in Thornton, Colorado.
Where can I find hotels near RMRR Fall Marathon Training Series #3 2026 — Thornton, CO?
RaceHotelFinder shows hotels sorted by distance from the race venue in Thornton. Use the map or list view on this page to compare options and book race weekend accommodation.