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BOSTON MARATHON 2023

Grace Thacker

Bib: 8786•F

LA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 20%
Gender (Female)
#0 / 11423
Top 4%
Masters (Masters Women)
#0 / 6539
Top 1%
Division (F40-44)
#0 / 1878
Top 3%
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
6:42/mi
20:49
↑ 97↓ 3451.5%
10K· 6.21 mi
6:44/mi
41:45
↑ 79↓ 1380.4%
15K· 9.32 mi
6:50/mi
1:02:58
↑ 67↓ 78
20K· 12.43 mi
6:49/mi
1:24:10
↑ 106↓ 860.1%
Half· 13.11 mi
6:45/mi
1:28:46
↑ 19↓ 370.5%
25K· 15.53 mi
6:53/mi
1:45:28
↑ 66↓ 880.2%
30K· 18.64 mi
7:20/mi
2:08:14
↑ 181↓ 1480.2%
20M
7:29/mi
2:18:24
↑ 64↓ 500.2%
21M
8:03/mi
2:26:27
↑ 106↓ 241.6%
35K· 21.75 mi
7:06/mi
2:31:46
↑ 17↓ 861.7%
23M
7:43/mi
2:41:26
↑ 23↓ 630.6%
24M
7:20/mi
2:48:46
↓ 821.3%
40K· 24.85 mi
7:34/mi
2:55:14
↓ 200.3%
25.2M
7:56/mi
2:57:58
↑ 13↓ 160.2%
Finish· 26.22 mi
7:04/mi
3:05:10
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:46
Pace6:46 /mi
2nd Half
Distance13.11 mi
Time1:36:24
Pace7:21 /mi
📊Positive Split: 8.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:45:5620:496:4220:49
6:42
-
10K
6.21 mi11:06:5241:456:4320:56
6:44
+0:02
15K
9.32 mi11:28:051:02:586:4521:13
6:50
+0:06
20K
12.43 mi11:49:171:24:106:4621:12
6:49
-0:01
Half
13.11 mi11:53:531:28:466:464:36
6:45
-0:04
25K
15.53 mi12:10:351:45:286:4716:42
6:53
+0:08
30K
18.64 mi12:33:212:08:146:5322:46
7:20
+0:27
20M
20.00 mi12:43:312:18:246:5510:10
7:29
+0:09
21M
21.00 mi12:51:342:26:276:588:03
8:03
+0:34
35K
21.75 mi12:56:532:31:466:595:19
7:06
-0:57
23M
23.00 mi13:06:332:41:267:019:40
7:43
+0:37
24M
24.00 mi13:13:532:48:467:027:20
7:20
-0:23
40K
24.85 mi13:20:212:55:147:036:28
7:34
+0:14
25.2M
25.20 mi13:23:052:57:587:042:44
7:56
+0:22
Finish
26.22 mi13:30:173:05:107:047:12
7:04
-0:52

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

6:42 /mi

Average Pace

7:04 /mi

Slowest Pace

8:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:28:46

48% of race

Time at Steady Pace

29:13

16% of race

Time at Slower Pace

1:07:11

36% of race

Average Pace: 7:04 /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 mi10:45:5620:496:4220:49
6:42
#3694
10K
6.21 mi11:06:5241:456:4320:56
6:44
#4192
15K
9.32 mi11:28:051:02:586:4521:13
6:50
#4572
20K
12.43 mi11:49:171:24:106:4621:12
6:49
#4586
Half
13.11 mi11:53:531:28:466:464:36
6:45
#4575
25K
15.53 mi12:10:351:45:286:4716:42
6:53
#4590
30K
18.64 mi12:33:212:08:146:5322:46
7:20
#4998
20M
20.00 mi12:43:312:18:246:5510:10
7:29
#5150
21M
21.00 mi12:51:342:26:276:588:03
8:03
#5244
35K
21.75 mi12:56:532:31:466:595:19
7:06
#5255
23M
23.00 mi13:06:332:41:267:019:40
7:43
#5341
24M
24.00 mi13:13:532:48:467:027:20
7:20
#5340
40K
24.85 mi13:20:212:55:147:036:28
7:34
#5342
25.2M
25.20 mi13:23:052:57:587:042:44
7:56
#5331
Finish
26.22 mi13:30:173:05:107:047:12
7:04
#5290
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi36942182185400(Top 20%)412(Top 4%)412(Top 22%)
10K6.21 mi3.10 mi4192-498258-40258-404731(Top 18%)328(Top 3%)328(Top 17%)
15K9.32 mi3.11 mi4572-380297-39297-395400(Top 20%)412(Top 4%)412(Top 22%)
20K12.43 mi3.11 mi4586-14302-5302-54683(Top 18%)321(Top 3%)321(Top 17%)
Half13.11 mi0.68 mi4575+11301+1301+14861(Top 18%)355(Top 3%)355(Top 19%)
25K15.53 mi2.42 mi4590-15300+1300+14890(Top 18%)361(Top 3%)361(Top 19%)
30K18.64 mi3.11 mi4998-408355-55355-556193(Top 23%)675(Top 6%)675(Top 36%)
20M20.00 mi1.36 mi5150-152383-28383-286682(Top 25%)908(Top 8%)908(Top 48%)
21M21.00 mi1.00 mi5244-94403-20403-207683(Top 29%)1368(Top 12%)1368(Top 73%)
35K21.75 mi0.75 mi5255-11414-11414-115977(Top 22%)747(Top 7%)747(Top 40%)
23M23.00 mi1.25 mi5341-86434-20434-207865(Top 30%)1512(Top 13%)1512(Top 81%)
24M24.00 mi1.00 mi5340+1442-8442-86624(Top 25%)1106(Top 10%)1106(Top 59%)
40K24.85 mi0.85 mi5342-2453-11453-117116(Top 27%)1403(Top 12%)1403(Top 75%)
25.2M25.20 mi0.35 mi5331+11458-5458-56121(Top 23%)1071(Top 9%)1071(Top 57%)
Finish26.22 mi1.02 mi5290+41450+8450+85636(Top 21%)949(Top 8%)949(Top 51%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 20%
×21story building
+97ft-345ft

Overall

5400

Females

412

F40-44

412

5K→10K

3.1 - 6.2 mi

Top 18%
×5story building
+79ft-138ft

Overall

4731

Females

328

F40-44

328

10K→15K

6.2 - 9.3 mi

Top 20%
×3story building
+67ft-78ft

Overall

5400

Females

412

F40-44

412

15K→20K

9.3 - 12.4 mi

Top 18%
×5story building
+106ft-86ft

Overall

4683

Females

321

F40-44

321

20K→Half

12.4 - 13.1 mi

Top 18%
×2story building
+19ft-37ft

Overall

4861

Females

355

F40-44

355

Half→25K

13.1 - 15.5 mi

Top 18%
×4story building
+66ft-88ft

Overall

4890

Females

361

F40-44

361

25K→30K

15.5 - 18.6 mi

Top 23%
×9story building
+181ft-148ft

Overall

6193

Females

675

F40-44

675

30K→20M

18.6 - 20.0 mi

Top 25%
×5story building
+64ft-50ft

Overall

6682

Females

908

F40-44

908

20M→21M

20.0 - 21.0 mi

Top 29%
×8story building
+106ft-24ft

Overall

7683

Females

1368

F40-44

1368

21M→35K

21.0 - 21.8 mi

Top 22%
×7story building
+17ft-86ft

Overall

5977

Females

747

F40-44

747

35K→23M

21.8 - 23.0 mi

Top 30%
×5story building
+23ft-63ft

Overall

7865

Females

1512

F40-44

1512

23M→24M

23.0 - 24.0 mi

Top 25%
×6story building
+12ft-82ft

Overall

6624

Females

1106

F40-44

1106

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7116

Females

1403

F40-44

1403

40K→25.2M

24.9 - 25.2 mi

Top 23%
×1story
+13ft-16ft

Overall

6121

Females

1071

F40-44

1071

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2story building
+22ft-21ft

Overall

5636

Females

949

F40-44

949

Passing Analysis

Category:
Athletes Passed
689
Passed By
2285
Net Change
-1596
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3694
5K → 10K54552-498#3694#4192
10K → 15K47427-380#4192#4572
15K → 20K96110-14#4572#4586
20K → Half2514+11#4586#4575
Half → 25K90105-15#4575#4590
25K → 30K48456-408#4590#4998
30K → 20M35187-152#4998#5150
20M → 21M30124-94#5150#5244
21M → 35K3142-11#5244#5255
35K → 23M38124-86#5255#5341
23M → 24M4544+1#5341#5340
24M → 40K5456-2#5340#5342
40K → 25.2M2817+11#5342#5331
25.2M → Finish6827+41#5331#5290
TOTALS6892285-1596
📊

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