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BOSTON MARATHON 2023

Natasha Ashenhurst

Bib: 20462•F

WA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:00/mi
24:52
↑ 97↓ 3451.5%
10K· 6.21 mi
7:48/mi
49:07
↑ 79↓ 1380.4%
15K· 9.32 mi
8:12/mi
1:14:36
↑ 67↓ 78
20K· 12.43 mi
8:36/mi
1:41:18
↑ 106↓ 860.1%
Half· 13.11 mi
8:33/mi
1:47:08
↑ 19↓ 370.5%
25K· 15.53 mi
9:11/mi
2:09:23
↑ 66↓ 880.2%
30K· 18.64 mi
9:59/mi
2:40:23
↑ 181↓ 1480.2%
20M
11:14/mi
2:55:39
↑ 64↓ 500.2%
21M
11:14/mi
3:06:53
↑ 106↓ 241.6%
35K· 21.75 mi
10:39/mi
3:14:51
↑ 17↓ 861.7%
23M
11:09/mi
3:28:49
↑ 23↓ 630.6%
24M
12:09/mi
3:40:58
↓ 821.3%
40K· 24.85 mi
11:03/mi
3:50:25
↓ 200.3%
25.2M
11:56/mi
3:54:32
↑ 13↓ 160.2%
Finish· 26.22 mi
10:45/mi
4:05:29
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:08
Pace8:10 /mi
2nd Half
Distance13.11 mi
Time2:18:21
Pace10:33 /mi
📊Positive Split: 29.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:1824:528:0024:52
8:00
-
10K
6.21 mi11:41:3349:077:5424:15
7:48
-0:12
15K
9.32 mi12:07:021:14:368:0025:29
8:12
+0:24
20K
12.43 mi12:33:441:41:188:0926:42
8:36
+0:24
Half
13.11 mi12:39:341:47:088:105:50
8:33
-0:03
25K
15.53 mi13:01:492:09:238:2022:15
9:11
+0:38
30K
18.64 mi13:32:492:40:238:3631:00
9:59
+0:48
20M
20.00 mi13:48:052:55:398:4715:16
11:14
+1:15
21M
21.00 mi13:59:193:06:538:5411:14
11:14
0:00
35K
21.75 mi14:07:173:14:518:587:58
10:39
-0:35
23M
23.00 mi14:21:153:28:499:0513:58
11:09
+0:30
24M
24.00 mi14:33:243:40:589:1212:09
12:09
+1:00
40K
24.85 mi14:42:513:50:259:169:27
11:03
-1:06
25.2M
25.20 mi14:46:583:54:329:184:07
11:56
+0:53
Finish
26.22 mi14:57:554:05:299:2210:57
10:45
-1:11

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:48 /mi

Average Pace

9:22 /mi

Slowest Pace

12:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:09:23

53% of race

Time at Steady Pace

1:39:50

41% of race

Time at Slower Pace

16:16

7% of race

Average Pace: 9:22 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:17:1824:528:0024:52
8:00
#14069
10K
6.21 mi11:41:3349:077:5424:15
7:48
#13643
15K
9.32 mi12:07:021:14:368:0025:29
8:12
#14393
20K
12.43 mi12:33:441:41:188:0926:42
8:36
#15267
Half
13.11 mi12:39:341:47:088:105:50
8:33
#15398
25K
15.53 mi13:01:492:09:238:2022:15
9:11
#16253
30K
18.64 mi13:32:492:40:238:3631:00
9:59
#17384
20M
20.00 mi13:48:052:55:398:4715:16
11:14
#18228
21M
21.00 mi13:59:193:06:538:5411:14
11:14
#18553
35K
21.75 mi14:07:173:14:518:587:58
10:39
#18809
23M
23.00 mi14:21:153:28:499:0513:58
11:09
#19203
24M
24.00 mi14:33:243:40:589:1212:09
12:09
#19689
40K
24.85 mi14:42:513:50:259:169:27
11:03
#19850
25.2M
25.20 mi14:46:583:54:329:184:07
11:56
#19930
Finish
26.22 mi14:57:554:05:299:2210:57
10:45
#20087
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi140694077407715898(Top 60%)5232(Top 46%)5232(Top 433%)
10K6.21 mi3.10 mi13643+4263834+2433834+24313200(Top 50%)3555(Top 31%)3555(Top 295%)
15K9.32 mi3.11 mi14393-7504295-4614295-46115898(Top 60%)5232(Top 46%)5232(Top 433%)
20K12.43 mi3.11 mi15267-8744850-5554850-55517467(Top 66%)6208(Top 54%)6208(Top 514%)
Half13.11 mi0.68 mi15398-1314932-824932-8218104(Top 68%)6568(Top 57%)6568(Top 544%)
25K15.53 mi2.42 mi16253-8555487-5555487-55519746(Top 74%)7558(Top 66%)7558(Top 626%)
30K18.64 mi3.11 mi17384-11316180-6936180-69320980(Top 79%)8330(Top 73%)8330(Top 690%)
20M20.00 mi1.36 mi18228-8446719-5396719-53923080(Top 87%)9557(Top 84%)9557(Top 792%)
21M21.00 mi1.00 mi18553-3256906-1876906-18721331(Top 80%)8643(Top 76%)8643(Top 716%)
35K21.75 mi0.75 mi18809-2567062-1567062-15622674(Top 85%)9404(Top 82%)9404(Top 779%)
23M23.00 mi1.25 mi19203-3947297-2357297-23522650(Top 85%)9401(Top 82%)9401(Top 779%)
24M24.00 mi1.00 mi19689-4867587-2907587-29024712(Top 93%)10531(Top 92%)10531(Top 872%)
40K24.85 mi0.85 mi19850-1617694-1077694-10722459(Top 84%)9374(Top 82%)9374(Top 777%)
25.2M25.20 mi0.35 mi19930-807745-517745-5122384(Top 84%)9332(Top 82%)9332(Top 773%)
Finish26.22 mi1.02 mi20087-1577851-1067851-10623494(Top 88%)9898(Top 87%)9898(Top 820%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21story building
+97ft-345ft

Overall

15898

Females

5232

F50-54

5232

5K→10K

3.1 - 6.2 mi

Top 50%
×5story building
+79ft-138ft

Overall

13200

Females

3555

F50-54

3555

10K→15K

6.2 - 9.3 mi

Top 60%
×3story building
+67ft-78ft

Overall

15898

Females

5232

F50-54

5232

15K→20K

9.3 - 12.4 mi

Top 66%
×5story building
+106ft-86ft

Overall

17467

Females

6208

F50-54

6208

20K→Half

12.4 - 13.1 mi

Top 68%
×2story building
+19ft-37ft

Overall

18104

Females

6568

F50-54

6568

Half→25K

13.1 - 15.5 mi

Top 74%
×4story building
+66ft-88ft

Overall

19746

Females

7558

F50-54

7558

25K→30K

15.5 - 18.6 mi

Top 79%
×9story building
+181ft-148ft

Overall

20980

Females

8330

F50-54

8330

30K→20M

18.6 - 20.0 mi

Top 87%
×5story building
+64ft-50ft

Overall

23080

Females

9557

F50-54

9557

20M→21M

20.0 - 21.0 mi

Top 80%
×8story building
+106ft-24ft

Overall

21331

Females

8643

F50-54

8643

21M→35K

21.0 - 21.8 mi

Top 85%
×7story building
+17ft-86ft

Overall

22674

Females

9404

F50-54

9404

35K→23M

21.8 - 23.0 mi

Top 85%
×5story building
+23ft-63ft

Overall

22650

Females

9401

F50-54

9401

23M→24M

23.0 - 24.0 mi

Top 93%
×6story building
+12ft-82ft

Overall

24712

Females

10531

F50-54

10531

24M→40K

24.0 - 24.9 mi

Top 84%
×1story
+6ft-20ft

Overall

22459

Females

9374

F50-54

9374

40K→25.2M

24.9 - 25.2 mi

Top 84%
×1story
+13ft-16ft

Overall

22384

Females

9332

F50-54

9332

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

23494

Females

9898

F50-54

9898

Passing Analysis

Category:
Athletes Passed
774
Passed By
6792
Net Change
-6018
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14069
5K → 10K564138+426#14069#13643
10K → 15K27777-750#13643#14393
15K → 20K38912-874#14393#15267
20K → Half14145-131#15267#15398
Half → 25K20875-855#15398#16253
25K → 30K291160-1131#16253#17384
30K → 20M6850-844#17384#18228
20M → 21M21346-325#18228#18553
21M → 35K10266-256#18553#18809
35K → 23M12406-394#18809#19203
23M → 24M4490-486#19203#19689
24M → 40K16177-161#19689#19850
40K → 25.2M585-80#19850#19930
25.2M → Finish8165-157#19930#20087
TOTALS7746792-6018
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing