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BOSTON MARATHON 2023

Debbie Stemmerman

Bib: 18238•F

OR

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 46%
Masters (Masters Women)
#0 / 6539
Top 35%
Division (F55-59)
#0 / 815
Top 13%
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
8:13/mi
25:31
↑ 97↓ 3451.5%
10K· 6.21 mi
8:01/mi
50:24
↑ 79↓ 1380.4%
15K· 9.32 mi
8:31/mi
1:16:53
↑ 67↓ 78
20K· 12.43 mi
8:51/mi
1:44:22
↑ 106↓ 860.1%
Half· 13.11 mi
8:05/mi
1:49:53
↑ 19↓ 370.5%
25K· 15.53 mi
8:29/mi
2:10:28
↑ 66↓ 880.2%
30K· 18.64 mi
8:40/mi
2:37:23
↑ 181↓ 1480.2%
20M
8:34/mi
2:49:02
↑ 64↓ 500.2%
21M
9:22/mi
2:58:24
↑ 106↓ 241.6%
35K· 21.75 mi
8:19/mi
3:04:37
↑ 17↓ 861.7%
23M
8:30/mi
3:15:15
↑ 23↓ 630.6%
24M
8:20/mi
3:23:35
↓ 821.3%
40K· 24.85 mi
8:32/mi
3:30:53
↓ 200.3%
25.2M
9:28/mi
3:34:09
↑ 13↓ 160.2%
Finish· 26.22 mi
8:26/mi
3:42:45
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:53
Pace8:23 /mi
2nd Half
Distance13.11 mi
Time1:52:52
Pace8:37 /mi
📊Positive Split: 2.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:3225:318:1325:31
8:13
-
10K
6.21 mi11:41:2550:248:0724:53
8:01
-0:12
15K
9.32 mi12:07:541:16:538:1526:29
8:31
+0:30
20K
12.43 mi12:35:231:44:228:2427:29
8:51
+0:20
Half
13.11 mi12:40:541:49:538:235:31
8:05
-0:46
25K
15.53 mi13:01:292:10:288:2420:35
8:29
+0:24
30K
18.64 mi13:28:242:37:238:2726:55
8:40
+0:11
20M
20.00 mi13:40:032:49:028:2711:39
8:34
-0:06
21M
21.00 mi13:49:252:58:248:309:22
9:22
+0:48
35K
21.75 mi13:55:383:04:378:296:13
8:19
-1:03
23M
23.00 mi14:06:163:15:158:2910:38
8:30
+0:11
24M
24.00 mi14:14:363:23:358:298:20
8:20
-0:10
40K
24.85 mi14:21:543:30:538:297:18
8:32
+0:12
25.2M
25.20 mi14:25:103:34:098:303:16
9:28
+0:56
Finish
26.22 mi14:33:463:42:458:308:36
8:26
-1:02

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

8:01 /mi

Average Pace

8:30 /mi

Slowest Pace

9:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:02:38

82% of race

Time at Steady Pace

36:51

17% of race

Time at Slower Pace

3:16

1% of race

Average Pace: 8:30 /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 mi11:16:3225:318:1325:31
8:13
#15574
10K
6.21 mi11:41:2550:248:0724:53
8:01
#15202
15K
9.32 mi12:07:541:16:538:1526:29
8:31
#16179
20K
12.43 mi12:35:231:44:228:2427:29
8:51
#16928
Half
13.11 mi12:40:541:49:538:235:31
8:05
#16830
25K
15.53 mi13:01:292:10:288:2420:35
8:29
#16727
30K
18.64 mi13:28:242:37:238:2726:55
8:40
#16427
20M
20.00 mi13:40:032:49:028:2711:39
8:34
#16231
21M
21.00 mi13:49:252:58:248:309:22
9:22
#16154
35K
21.75 mi13:55:383:04:378:296:13
8:19
#16064
23M
23.00 mi14:06:163:15:158:2910:38
8:30
#15879
24M
24.00 mi14:14:363:23:358:298:20
8:20
#15757
40K
24.85 mi14:21:543:30:538:297:18
8:32
#15668
25.2M
25.20 mi14:25:103:34:098:303:16
9:28
#15665
Finish
26.22 mi14:33:463:42:458:308:36
8:26
#15633
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi155745019501917973(Top 68%)6471(Top 57%)6471(Top 794%)
10K6.21 mi3.10 mi15202+3724772+2474772+24714886(Top 56%)4603(Top 40%)4603(Top 565%)
15K9.32 mi3.11 mi16179-9775397-6255397-62517973(Top 68%)6471(Top 57%)6471(Top 794%)
20K12.43 mi3.11 mi16928-7495883-4865883-48618921(Top 71%)7038(Top 62%)7038(Top 864%)
Half13.11 mi0.68 mi16830+985818+655818+6515119(Top 57%)4764(Top 42%)4764(Top 585%)
25K15.53 mi2.42 mi16727+1035786+325786+3216137(Top 61%)5521(Top 48%)5521(Top 677%)
30K18.64 mi3.11 mi16427+3005646+1405646+14015302(Top 57%)5117(Top 45%)5117(Top 628%)
20M20.00 mi1.36 mi16231+1965535+1115535+11114120(Top 53%)4492(Top 39%)4492(Top 551%)
21M21.00 mi1.00 mi16154+775508+275508+2715347(Top 58%)5255(Top 46%)5255(Top 645%)
35K21.75 mi0.75 mi16064+905475+335475+3314204(Top 53%)4684(Top 41%)4684(Top 575%)
23M23.00 mi1.25 mi15879+1855385+905385+9013214(Top 50%)4199(Top 37%)4199(Top 515%)
24M24.00 mi1.00 mi15757+1225339+465339+4613483(Top 51%)4393(Top 38%)4393(Top 539%)
40K24.85 mi0.85 mi15668+895286+535286+5313627(Top 51%)4548(Top 40%)4548(Top 558%)
25.2M25.20 mi0.35 mi15665+35283+35283+315115(Top 57%)5369(Top 47%)5369(Top 659%)
Finish26.22 mi1.02 mi15633+325275+85275+815038(Top 56%)5273(Top 46%)5273(Top 647%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 68%
×21story building
+97ft-345ft

Overall

17973

Females

6471

F55-59

6471

5K→10K

3.1 - 6.2 mi

Top 56%
×5story building
+79ft-138ft

Overall

14886

Females

4603

F55-59

4603

10K→15K

6.2 - 9.3 mi

Top 68%
×3story building
+67ft-78ft

Overall

17973

Females

6471

F55-59

6471

15K→20K

9.3 - 12.4 mi

Top 71%
×5story building
+106ft-86ft

Overall

18921

Females

7038

F55-59

7038

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

15119

Females

4764

F55-59

4764

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

16137

Females

5521

F55-59

5521

25K→30K

15.5 - 18.6 mi

Top 57%
×9story building
+181ft-148ft

Overall

15302

Females

5117

F55-59

5117

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

14120

Females

4492

F55-59

4492

20M→21M

20.0 - 21.0 mi

Top 58%
×8story building
+106ft-24ft

Overall

15347

Females

5255

F55-59

5255

21M→35K

21.0 - 21.8 mi

Top 53%
×7story building
+17ft-86ft

Overall

14204

Females

4684

F55-59

4684

35K→23M

21.8 - 23.0 mi

Top 50%
×5story building
+23ft-63ft

Overall

13214

Females

4199

F55-59

4199

23M→24M

23.0 - 24.0 mi

Top 51%
×6story building
+12ft-82ft

Overall

13483

Females

4393

F55-59

4393

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

13627

Females

4548

F55-59

4548

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

15115

Females

5369

F55-59

5369

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2story building
+22ft-21ft

Overall

15038

Females

5273

F55-59

5273

Passing Analysis

Category:
Athletes Passed
2192
Passed By
2251
Net Change
-59
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15574
5K → 10K535163+372#15574#15202
10K → 15K231000-977#15202#16179
15K → 20K38787-749#16179#16928
20K → Half1013+98#16928#16830
Half → 25K16663+103#16830#16727
25K → 30K35050+300#16727#16427
30K → 20M2026+196#16427#16231
20M → 21M11841+77#16231#16154
21M → 35K10616+90#16154#16064
35K → 23M19813+185#16064#15879
23M → 24M13917+122#15879#15757
24M → 40K11425+89#15757#15668
40K → 25.2M2825+3#15668#15665
25.2M → Finish7442+32#15665#15633
TOTALS21922251-59
📊

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