Your plan in four answers
Set for April 18, 2027, about 25 weeks out.
- Distances
- 5K, 10K, Half marathon, Marathon
- Sport
- Running
- Taper starts
- March 31, 2027
Course
The Delaware Marathon course
All races start and finish at Tubman-Garrett Riverfront Park in Wilmington, with the marathon, half and 10K off at 7:00 a.m. The first 13 miles of the marathon tour downtown Wilmington, cross Brandywine Park along the Brandywine River, pass Rodney Square and run near the 100-year-old tower in Rockford Park.
Read the full course notes
The second half follows the Jack Markell Trail almost to New Castle, turns at New Castle Elementary School and returns to the riverfront. The course tops out at 185 feet, has 13 water stops, and is a USATF certified Boston qualifier where historically 10% to 12% of marathoners have qualified.
- Distances
- 5K, 10K, Half marathon, Marathon
- Weather on race day
- Mid-April in Wilmington usually brings cool mornings in the upper 40s °F and afternoon highs in the mid 60s °F, close to ideal for distance racing. There is roughly a 30% chance of a wet day, and winds of about 8 mph come mostly from the west, which you may notice on the open trail section. Bring a throwaway layer for the start and you will likely shed it in the first miles.
What to train for
Plan for two different races in one: a park-and-neighborhood first half with gentle ups and downs around Brandywine and Rockford Parks, then a long, steady trail section where rhythm matters most.
Practice long runs that finish on flat ground at goal pace so the Jack Markell Trail out-and-back feels like a place to settle in.
Because the trail has limited access points, train with the fuel you will carry and rehearse taking it between stops. Marathoners have 7 hours and half marathoners 3.5 hours, so every pace is welcome here.
Sample week
A sample Delaware Marathon training week
A week from the middle of the build, about six weeks out. Your plan sets the real distances and paces from your own fitness and adjusts them every week as you train.
- Monday
- Rest, or 20 minutes of mobility
- Tuesday Key session
- Intervals: 5 × 1 mile at 5K to 10K effort, easy jog between
- Wednesday
- Easy run, 6–7 mi
- Thursday Key session
- Goal-pace run, 10 mi with 6 mi at race pace
- Friday
- Recovery run, 4 mi, or cross-train
- Saturday Key session
- Long run, 16–18 mi, the last 4 mi at race pace
- Sunday
- Easy run, 4 mi, then 6 relaxed strides
Your build to race day
Taper
Tapering for the Delaware Marathon
Start the taper two to three weeks before race day. Cut your weekly volume by about a third, then by half in race week, and keep a few short efforts at race pace so your legs stay sharp. With the race on April 18, 2027, your taper starts around March 31, 2027.
Also in Claude
Ask Claude for this plan
Add AthleteSpace to Claude once, then paste this prompt and put in your own numbers.
Build me a training plan for the Delaware Marathon Running Festival on April 18, 2027. I run [distance] a week, [days] days a week, easy pace [pace].
Delaware Marathon training questions
How long should I train for the Delaware Marathon?
Most runners give a marathon sixteen to twenty weeks of focused training on top of an existing base. The plan above counts back from your actual race date, so if you have less time than that it builds the best plan the remaining weeks allow rather than pretending you have longer.
Is the Delaware Marathon course hilly?
All races start and finish at Tubman-Garrett Riverfront Park in Wilmington, with the marathon, half and 10K off at 7:00 a.m.
What is the weather usually like at the Delaware Marathon?
Mid-April in Wilmington usually brings cool mornings in the upper 40s °F and afternoon highs in the mid 60s °F, close to ideal for distance racing. There is roughly a 30% chance of a wet day, and winds of about 8 mph come mostly from the west, which you may notice on the open trail section. Bring a throwaway layer for the start and you will likely shed it in the first miles.
When should I start tapering for the Delaware Marathon?
Start the taper two to three weeks before race day. Cut your weekly volume by about a third, then by half in race week, and keep a few short efforts at race pace so your legs stay sharp. With the race on April 18, 2027, your taper starts around March 31, 2027.
Do I need an account to get a Delaware Marathon training plan?
No. The plan above builds in your browser with no account, no email, and no card. Make a free account only if you want to keep it, log your runs against it, and have the coach keep adapting it as your training goes.