Stage 3 of 13 · Offa's Dyke Path

Km 40 → Nantyglasdwr Lane

Distance

38.6 km

Ascent

+932 m

Descent

-906 m

Est. Time

10h 53m

Altitude

55–712.2 m

Type

point-to-point

⛰️ Rolling Hills📏 Ultra Distance

📍

Start: Km 40

No nearby transit stop. Consider getting dropped off or using the previous stage's end stop.

🚌

Getting Out

Nantyglasdwr Lane (bus stop)

321m from trail end · ~4 min walk

📥 Download GPX 🗺️ Open in Planner 🏔️ 3D Flyover 38.6 km · 932m gain

Elevation Profile

Flat (<5%) Easy (5–10%) Moderate (10–15%)

Route Map

🗺️ Open in Planner → | 🏔️ View 3D Flyover →

Segment Breakdown

Auto-analyzed from the elevation profile. Each segment shows the dominant character for planning your effort.

Segment	Dist	↑ / ↓	Time	Character
Km 40 → km 12.2 (223m) 0–223m	12.2 km	+390m / -256m	3h 12m	📈 Climbing
km 12.2 (223m) → km 13.9 (121m) 116–223m	1.7 km	+5m / -107m	24 min	📉 Descending
km 13.9 (121m) → Nantyglasdwr Lane 105–712m	24.7 km	+732m / -747m	6h 31m	🏃 Highly Runnable
Total	38.6 km	+932m / -906m	10h 09m

Pace & Fuel Calculator

Adjust your flat 10K pace to see personalized finish time, calorie burn, and hydration needs.

Your flat 10K pace 7:00 /km

4:00 /km (elite) 12:00 /km (leisure)

Fast Hiker / Jogger

Est. Finish Time

6h 02m

Calories

3,131 kcal

Water Needed

4.4 L

Effort Distance

52.5 km

flat-equivalent

🍫 Recommended: ~45g carbs/hr (272g total) 🧂 Electrolytes: ~3018mg sodium/hr 🩹 Consider anti-chafe and blister prevention

Terrain Analysis

Runnability

Steep / Technical

% of route below 15% gradient

Climb Ratio

24 m/km

Moderate profile

↑ 932m ↓ 906m

Surface & Technicality

Terrain Difficulty Breakdown

Runnable Flat (71%) Easy Grade (14%) Moderate Climb (14%)

Surface Type

Unknown (43%) Asphalt (22%) Grass (10%) Dirt (9%) Ground (4%) Gravel (3%) Unpaved (2%) Wood (2%) Concrete (1%) Compacted (1%) Fine gravel (1%) Paved (1%)

🏃 Mostly runnable with gentle terrain. Great for fast trail running.

Surface Breakdown

Unknown (43%)

Paved (22%)

Grass (10%)

Dirt (9%)

Natural Ground (4%)

Gravel (3%)

Unpaved Trail (2%)

Wood (2%)

Paved (1%)

Compacted (1%)

Fine Gravel (1%)

Paved (1%)

Current Conditions

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Conditions for June

ℹ️ Shoulder season

Snow Risk

Unlikely

53% north-facing slopes

Mud Risk

15%

Low

Ice Risk

Unlikely

✅ Snow unlikely at this elevation in June. Trail conditions expected to be clear.

Best months: May, Jun, Jul, Aug, Sep, Oct

Suggested Gear List

Auto-generated based on 38.6 km, 932m ascent, max altitude 712.2m, ~11h duration.

Essential 5 items

👟
Trail running shoes / hiking boots

Required for any trail
📱
Phone (charged) + offline map

Navigation & emergency contact
💧
3L hydration vest

No water sources on route
🍫
Trail mix, bars & sandwich

Est. 3810 kcal burn
🆘
Emergency space blanket

Critical for preventing hypothermia if you stop moving