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BOSTON MARATHON 2023

Kathleen Sheffield

Bib: 17374•F

NC

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 47%
Division (F18-39)
#0 / 4884
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
8:11/mi
25:25
↑ 97↓ 3451.5%
10K· 6.21 mi
8:03/mi
50:26
↑ 79↓ 1380.4%
15K· 9.32 mi
8:06/mi
1:15:35
↑ 67↓ 78
20K· 12.43 mi
8:11/mi
1:41:00
↑ 106↓ 860.1%
Half· 13.11 mi
8:02/mi
1:46:29
↑ 19↓ 370.5%
25K· 15.53 mi
8:31/mi
2:07:08
↑ 66↓ 880.2%
30K· 18.64 mi
8:35/mi
2:33:47
↑ 181↓ 1480.2%
20M
9:05/mi
2:46:07
↑ 64↓ 500.2%
21M
9:28/mi
2:55:35
↑ 106↓ 241.6%
35K· 21.75 mi
9:07/mi
3:02:24
↑ 17↓ 861.7%
23M
9:12/mi
3:13:55
↑ 23↓ 630.6%
24M
9:10/mi
3:23:05
↓ 821.3%
40K· 24.85 mi
9:14/mi
3:30:59
↓ 200.3%
25.2M
9:54/mi
3:34:24
↑ 13↓ 160.2%
Finish· 26.22 mi
9:15/mi
3:43:50
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:29
Pace8:07 /mi
2nd Half
Distance13.11 mi
Time1:57:21
Pace8:57 /mi
📊Positive Split: 10.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:0225:258:1125:25
8:11
-
10K
6.21 mi11:46:0350:268:0725:01
8:03
-0:08
15K
9.32 mi12:11:121:15:358:0725:09
8:06
+0:03
20K
12.43 mi12:36:371:41:008:0825:25
8:11
+0:05
Half
13.11 mi12:42:061:46:298:075:29
8:02
-0:09
25K
15.53 mi13:02:452:07:088:1120:39
8:31
+0:29
30K
18.64 mi13:29:242:33:478:1526:39
8:35
+0:04
20M
20.00 mi13:41:442:46:078:1812:20
9:05
+0:30
21M
21.00 mi13:51:122:55:358:229:28
9:28
+0:23
35K
21.75 mi13:58:013:02:248:236:49
9:07
-0:21
23M
23.00 mi14:09:323:13:558:2611:31
9:12
+0:05
24M
24.00 mi14:18:423:23:058:289:10
9:10
-0:02
40K
24.85 mi14:26:363:30:598:297:54
9:14
+0:04
25.2M
25.20 mi14:30:013:34:248:303:25
9:54
+0:40
Finish
26.22 mi14:39:273:43:508:339:26
9:15
-0:39

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

8:02 /mi

Average Pace

8:33 /mi

Slowest Pace

9:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:33:47

69% of race

Time at Steady Pace

57:10

26% of race

Time at Slower Pace

12:53

6% of race

Average Pace: 8:32 /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 mi11:21:0225:258:1125:25
8:11
#15344
10K
6.21 mi11:46:0350:268:0725:01
8:03
#15236
15K
9.32 mi12:11:121:15:358:0725:09
8:06
#15185
20K
12.43 mi12:36:371:41:008:0825:25
8:11
#15078
Half
13.11 mi12:42:061:46:298:075:29
8:02
#15034
25K
15.53 mi13:02:452:07:088:1120:39
8:31
#15245
30K
18.64 mi13:29:242:33:478:1526:39
8:35
#15128
20M
20.00 mi13:41:442:46:078:1812:20
9:05
#15275
21M
21.00 mi13:51:122:55:358:229:28
9:28
#15277
35K
21.75 mi13:58:013:02:248:236:49
9:07
#15403
23M
23.00 mi14:09:323:13:558:2611:31
9:12
#15508
24M
24.00 mi14:18:423:23:058:289:10
9:10
#15614
40K
24.85 mi14:26:363:30:598:297:54
9:14
#15697
25.2M
25.20 mi14:30:013:34:248:303:25
9:54
#15734
Finish
26.22 mi14:39:273:43:508:339:26
9:15
#15888
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi153444864486415144(Top 57%)4763(Top 42%)4763(Top 98%)
10K6.21 mi3.10 mi15236+1084794+704794+7015201(Top 57%)4796(Top 42%)4796(Top 98%)
15K9.32 mi3.11 mi15185+514773+214773+2115144(Top 57%)4763(Top 42%)4763(Top 98%)
20K12.43 mi3.11 mi15078+1074732+414732+4114860(Top 56%)4628(Top 41%)4628(Top 95%)
Half13.11 mi0.68 mi15034+444708+244708+2414749(Top 55%)4545(Top 40%)4545(Top 93%)
25K15.53 mi2.42 mi15245-2114865-1574865-15716311(Top 61%)5618(Top 49%)5618(Top 115%)
30K18.64 mi3.11 mi15128+1174842+234842+2314798(Top 56%)4816(Top 42%)4816(Top 99%)
20M20.00 mi1.36 mi15275-1474957-1154957-11516930(Top 64%)6110(Top 53%)6110(Top 125%)
21M21.00 mi1.00 mi15277-24981-244981-2415822(Top 59%)5525(Top 48%)5525(Top 113%)
35K21.75 mi0.75 mi15403-1265073-925073-9218388(Top 69%)7038(Top 62%)7038(Top 144%)
23M23.00 mi1.25 mi15508-1055169-965169-9617057(Top 64%)6319(Top 55%)6319(Top 129%)
24M24.00 mi1.00 mi15614-1065251-825251-8217941(Top 67%)6865(Top 60%)6865(Top 141%)
40K24.85 mi0.85 mi15697-835304-535304-5317282(Top 65%)6554(Top 57%)6554(Top 134%)
25.2M25.20 mi0.35 mi15734-375325-215325-2117041(Top 64%)6433(Top 56%)6433(Top 132%)
Finish26.22 mi1.02 mi15888-1545422-975422-9719185(Top 72%)7539(Top 66%)7539(Top 154%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21story building
+97ft-345ft

Overall

15144

Females

4763

F18-39

4763

5K→10K

3.1 - 6.2 mi

Top 57%
×5story building
+79ft-138ft

Overall

15201

Females

4796

F18-39

4796

10K→15K

6.2 - 9.3 mi

Top 57%
×3story building
+67ft-78ft

Overall

15144

Females

4763

F18-39

4763

15K→20K

9.3 - 12.4 mi

Top 56%
×5story building
+106ft-86ft

Overall

14860

Females

4628

F18-39

4628

20K→Half

12.4 - 13.1 mi

Top 55%
×2story building
+19ft-37ft

Overall

14749

Females

4545

F18-39

4545

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

16311

Females

5618

F18-39

5618

25K→30K

15.5 - 18.6 mi

Top 56%
×9story building
+181ft-148ft

Overall

14798

Females

4816

F18-39

4816

30K→20M

18.6 - 20.0 mi

Top 64%
×5story building
+64ft-50ft

Overall

16930

Females

6110

F18-39

6110

20M→21M

20.0 - 21.0 mi

Top 59%
×8story building
+106ft-24ft

Overall

15822

Females

5525

F18-39

5525

21M→35K

21.0 - 21.8 mi

Top 69%
×7story building
+17ft-86ft

Overall

18388

Females

7038

F18-39

7038

35K→23M

21.8 - 23.0 mi

Top 64%
×5story building
+23ft-63ft

Overall

17057

Females

6319

F18-39

6319

23M→24M

23.0 - 24.0 mi

Top 67%
×6story building
+12ft-82ft

Overall

17941

Females

6865

F18-39

6865

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

17282

Females

6554

F18-39

6554

40K→25.2M

24.9 - 25.2 mi

Top 64%
×1story
+13ft-16ft

Overall

17041

Females

6433

F18-39

6433

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2story building
+22ft-21ft

Overall

19185

Females

7539

F18-39

7539

Passing Analysis

Category:
Athletes Passed
1509
Passed By
2053
Net Change
-544
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15344
5K → 10K364256+108#15344#15236
10K → 15K207156+51#15236#15185
15K → 20K242135+107#15185#15078
20K → Half5915+44#15078#15034
Half → 25K75286-211#15034#15245
25K → 30K240123+117#15245#15128
30K → 20M40187-147#15128#15275
20M → 21M8385-2#15275#15277
21M → 35K20146-126#15277#15403
35K → 23M66171-105#15403#15508
23M → 24M35141-106#15508#15614
24M → 40K40123-83#15614#15697
40K → 25.2M1754-37#15697#15734
25.2M → Finish21175-154#15734#15888
TOTALS15092053-544
📊

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