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BOSTON MARATHON 2023

Gemma Slater

Bib: 18654•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 43%
Masters (Masters Women)
#0 / 6539
Top 31%
Division (F40-44)
#0 / 1878
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
8:05/mi
25:06
↑ 97↓ 3451.5%
10K· 6.21 mi
7:57/mi
49:47
↑ 79↓ 1380.4%
15K· 9.32 mi
8:04/mi
1:14:52
↑ 67↓ 78
20K· 12.43 mi
8:11/mi
1:40:19
↑ 106↓ 860.1%
Half· 13.11 mi
8:08/mi
1:45:52
↑ 19↓ 370.5%
25K· 15.53 mi
8:17/mi
2:05:56
↑ 66↓ 880.2%
30K· 18.64 mi
8:35/mi
2:32:36
↑ 181↓ 1480.2%
20M
8:44/mi
2:44:28
↑ 64↓ 500.2%
21M
9:29/mi
2:53:57
↑ 106↓ 241.6%
35K· 21.75 mi
8:27/mi
3:00:16
↑ 17↓ 861.7%
23M
8:50/mi
3:11:19
↑ 23↓ 630.6%
24M
8:37/mi
3:19:56
↓ 821.3%
40K· 24.85 mi
8:56/mi
3:27:34
↓ 200.3%
25.2M
9:43/mi
3:30:55
↑ 13↓ 160.2%
Finish· 26.22 mi
8:56/mi
3:40:01
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:52
Pace8:05 /mi
2nd Half
Distance13.11 mi
Time1:54:09
Pace8:42 /mi
📊Positive Split: 7.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:2525:068:0525:06
8:05
-
10K
6.21 mi11:45:0649:478:0124:41
7:57
-0:08
15K
9.32 mi12:10:111:14:528:0225:05
8:04
+0:07
20K
12.43 mi12:35:381:40:198:0425:27
8:11
+0:07
Half
13.11 mi12:41:111:45:528:055:33
8:08
-0:03
25K
15.53 mi13:01:152:05:568:0620:04
8:17
+0:09
30K
18.64 mi13:27:552:32:368:1126:40
8:35
+0:18
20M
20.00 mi13:39:472:44:288:1311:52
8:44
+0:09
21M
21.00 mi13:49:162:53:578:179:29
9:29
+0:45
35K
21.75 mi13:55:353:00:168:176:19
8:27
-1:02
23M
23.00 mi14:06:383:11:198:1911:03
8:50
+0:23
24M
24.00 mi14:15:153:19:568:208:37
8:37
-0:13
40K
24.85 mi14:22:533:27:348:217:38
8:56
+0:19
25.2M
25.20 mi14:26:143:30:558:223:21
9:43
+0:47
Finish
26.22 mi14:35:203:40:018:249:06
8:56
-0:47

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

7:57 /mi

Average Pace

8:24 /mi

Slowest Pace

9:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:05:56

57% of race

Time at Steady Pace

1:04:31

29% of race

Time at Slower Pace

29:34

13% of race

Average Pace: 8:23 /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 mi11:20:2525:068:0525:06
8:05
#14567
10K
6.21 mi11:45:0649:478:0124:41
7:57
#14479
15K
9.32 mi12:10:111:14:528:0225:05
8:04
#14596
20K
12.43 mi12:35:381:40:198:0425:27
8:11
#14672
Half
13.11 mi12:41:111:45:528:055:33
8:08
#14694
25K
15.53 mi13:01:152:05:568:0620:04
8:17
#14690
30K
18.64 mi13:27:552:32:368:1126:40
8:35
#14704
20M
20.00 mi13:39:472:44:288:1311:52
8:44
#14723
21M
21.00 mi13:49:162:53:578:179:29
9:29
#14781
35K
21.75 mi13:55:353:00:168:176:19
8:27
#14765
23M
23.00 mi14:06:383:11:198:1911:03
8:50
#14791
24M
24.00 mi14:15:153:19:568:208:37
8:37
#14777
40K
24.85 mi14:22:533:27:348:217:38
8:56
#14790
25.2M
25.20 mi14:26:143:30:558:223:21
9:43
#14802
Finish
26.22 mi14:35:203:40:018:249:06
8:56
#14958
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi145674367436714999(Top 56%)4680(Top 41%)4680(Top 249%)
10K6.21 mi3.10 mi14479+884329+384329+3814380(Top 54%)4290(Top 38%)4290(Top 228%)
15K9.32 mi3.11 mi14596-1174409-804409-8014999(Top 56%)4680(Top 41%)4680(Top 249%)
20K12.43 mi3.11 mi14672-764475-664475-6614925(Top 56%)4668(Top 41%)4668(Top 249%)
Half13.11 mi0.68 mi14694-224492-174492-1715378(Top 58%)4912(Top 43%)4912(Top 262%)
25K15.53 mi2.42 mi14690+44520-284520-2814803(Top 56%)4707(Top 41%)4707(Top 251%)
30K18.64 mi3.11 mi14704-144558-384558-3814829(Top 56%)4834(Top 42%)4834(Top 257%)
20M20.00 mi1.36 mi14723-194591-334591-3315071(Top 57%)5038(Top 44%)5038(Top 268%)
21M21.00 mi1.00 mi14781-584653-624653-6215898(Top 60%)5569(Top 49%)5569(Top 297%)
35K21.75 mi0.75 mi14765+164662-94662-914999(Top 56%)5104(Top 45%)5104(Top 272%)
23M23.00 mi1.25 mi14791-264713-514713-5115140(Top 57%)5257(Top 46%)5257(Top 280%)
24M24.00 mi1.00 mi14777+144723-104723-1015177(Top 57%)5328(Top 47%)5328(Top 284%)
40K24.85 mi0.85 mi14790-134756-334756-3315773(Top 59%)5717(Top 50%)5717(Top 304%)
25.2M25.20 mi0.35 mi14802-124776-204776-2016205(Top 61%)5972(Top 52%)5972(Top 318%)
Finish26.22 mi1.02 mi14958-1564885-1094885-10917626(Top 66%)6711(Top 59%)6711(Top 357%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21story building
+97ft-345ft

Overall

14999

Females

4680

F40-44

4680

5K→10K

3.1 - 6.2 mi

Top 54%
×5story building
+79ft-138ft

Overall

14380

Females

4290

F40-44

4290

10K→15K

6.2 - 9.3 mi

Top 56%
×3story building
+67ft-78ft

Overall

14999

Females

4680

F40-44

4680

15K→20K

9.3 - 12.4 mi

Top 56%
×5story building
+106ft-86ft

Overall

14925

Females

4668

F40-44

4668

20K→Half

12.4 - 13.1 mi

Top 58%
×2story building
+19ft-37ft

Overall

15378

Females

4912

F40-44

4912

Half→25K

13.1 - 15.5 mi

Top 56%
×4story building
+66ft-88ft

Overall

14803

Females

4707

F40-44

4707

25K→30K

15.5 - 18.6 mi

Top 56%
×9story building
+181ft-148ft

Overall

14829

Females

4834

F40-44

4834

30K→20M

18.6 - 20.0 mi

Top 57%
×5story building
+64ft-50ft

Overall

15071

Females

5038

F40-44

5038

20M→21M

20.0 - 21.0 mi

Top 60%
×8story building
+106ft-24ft

Overall

15898

Females

5569

F40-44

5569

21M→35K

21.0 - 21.8 mi

Top 56%
×7story building
+17ft-86ft

Overall

14999

Females

5104

F40-44

5104

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

15140

Females

5257

F40-44

5257

23M→24M

23.0 - 24.0 mi

Top 57%
×6story building
+12ft-82ft

Overall

15177

Females

5328

F40-44

5328

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

15773

Females

5717

F40-44

5717

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

16205

Females

5972

F40-44

5972

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

17626

Females

6711

F40-44

6711

Passing Analysis

Category:
Athletes Passed
1422
Passed By
1813
Net Change
-391
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14567
5K → 10K340252+88#14567#14479
10K → 15K147264-117#14479#14596
15K → 20K159235-76#14596#14672
20K → Half2244-22#14672#14694
Half → 25K145141+4#14694#14690
25K → 30K164178-14#14690#14704
30K → 20M7695-19#14704#14723
20M → 21M64122-58#14723#14781
21M → 35K6044+16#14781#14765
35K → 23M7298-26#14765#14791
23M → 24M7359+14#14791#14777
24M → 40K5871-13#14777#14790
40K → 25.2M2234-12#14790#14802
25.2M → Finish20176-156#14802#14958
TOTALS14221813-391
📊

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