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BOSTON MARATHON 2023

Rebecca Tolkoff

MA

Bib: 29120 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
9:00/mi
27:59
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:58/mi
55:51
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
9:04/mi
1:24:01
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
9:18/mi
1:52:56
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
9:17/mi
1:59:16
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
9:32/mi
2:22:22
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
9:59/mi
2:53:23
↑ 181↓ 1480.2%
138 ft elev
20M
10:45/mi
3:07:59
↑ 64↓ 500.2%
148 ft elev
21M
11:43/mi
3:19:42
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
10:50/mi
3:27:48
↑ 17↓ 861.7%
156 ft elev
23M
11:17/mi
3:41:56
↑ 23↓ 630.6%
116 ft elev
24M
11:14/mi
3:53:10
↓ 821.3%
34 ft elev
40K· 24.85 mi
10:28/mi
4:02:07
↓ 200.3%
20 ft elev
25.2M
11:42/mi
4:06:09
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
10:26/mi
4:16:47
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:16
Pace9:06 /mi
2nd Half
Distance13.11 mi
Time2:17:31
Pace10:29 /mi
📊Positive Split: 15.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:1927:599:0027:59
9:00
-
10K
6.21 mi12:19:1155:518:5927:52
8:58
-0:02
15K
9.32 mi12:47:211:24:019:0128:10
9:04
+0:06
20K
12.43 mi13:16:161:52:569:0528:55
9:18
+0:14
Half
13.11 mi13:22:361:59:169:066:20
9:17
-0:01
25K
15.53 mi13:45:422:22:229:1023:06
9:32
+0:15
30K
18.64 mi14:16:432:53:239:1831:01
9:59
+0:27
20M
20.00 mi14:31:193:07:599:2414:36
10:45
+0:46
21M
21.00 mi14:43:023:19:429:3111:43
11:43
+0:58
35K
21.75 mi14:51:083:27:489:338:06
10:50
-0:53
23M
23.00 mi15:05:163:41:569:3914:08
11:17
+0:27
24M
24.00 mi15:16:303:53:109:4311:14
11:14
-0:03
40K
24.85 mi15:25:274:02:079:448:57
10:28
-0:46
25.2M
25.20 mi15:29:294:06:099:464:02
11:42
+1:14
Finish
26.22 mi15:40:074:16:479:4810:38
10:26
-1:16

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

8:58 /mi

Average Pace

9:48 /mi

Slowest Pace

11:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:22:22

55% of race

Time at Steady Pace

1:13:18

29% of race

Time at Slower Pace

41:07

16% of race

Average Pace: 9:48 /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 mi11:51:1927:599:0027:59
9:00
#20486
10K
6.21 mi12:19:1155:518:5927:52
8:58
#20606
15K
9.32 mi12:47:211:24:019:0128:10
9:04
#20629
20K
12.43 mi13:16:161:52:569:0528:55
9:18
#20719
Half
13.11 mi13:22:361:59:169:066:20
9:17
#20770
25K
15.53 mi13:45:422:22:229:1023:06
9:32
#20818
30K
18.64 mi14:16:432:53:239:1831:01
9:59
#20829
20M
20.00 mi14:31:193:07:599:2414:36
10:45
#20957
21M
21.00 mi14:43:023:19:429:3111:43
11:43
#21054
35K
21.75 mi14:51:083:27:489:338:06
10:50
#21152
23M
23.00 mi15:05:163:41:569:3914:08
11:17
#21289
24M
24.00 mi15:16:303:53:109:4311:14
11:14
#21423
40K
24.85 mi15:25:274:02:079:448:57
10:28
#21415
25.2M
25.20 mi15:29:294:06:099:464:02
11:42
#21435
Finish
26.22 mi15:40:074:16:479:4810:38
10:26
#21491
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi204868110811020810(Top 78%)8133(Top 71%)8133(Top 448%)
10K6.21 mi3.10 mi20606-1208092+188092+1820759(Top 78%)8126(Top 71%)8126(Top 447%)
15K9.32 mi3.11 mi20629-238086+68086+620810(Top 78%)8133(Top 71%)8133(Top 448%)
20K12.43 mi3.11 mi20719-908118-328118-3221003(Top 79%)8234(Top 72%)8234(Top 453%)
Half13.11 mi0.68 mi20770-518148-308148-3021480(Top 81%)8509(Top 74%)8509(Top 468%)
25K15.53 mi2.42 mi20818-488159-118159-1120933(Top 79%)8234(Top 72%)8234(Top 453%)
30K18.64 mi3.11 mi20829-118178-198178-1920994(Top 79%)8340(Top 73%)8340(Top 459%)
20M20.00 mi1.36 mi20957-1288271-938271-9322248(Top 84%)9113(Top 80%)9113(Top 502%)
21M21.00 mi1.00 mi21054-978351-808351-8022264(Top 84%)9144(Top 80%)9144(Top 503%)
35K21.75 mi0.75 mi21152-988407-568407-5622982(Top 86%)9580(Top 84%)9580(Top 527%)
23M23.00 mi1.25 mi21289-1378494-878494-8722876(Top 86%)9523(Top 83%)9523(Top 524%)
24M24.00 mi1.00 mi21423-1348570-768570-7623472(Top 88%)9881(Top 87%)9881(Top 544%)
40K24.85 mi0.85 mi21415+88577-78577-721145(Top 79%)8692(Top 76%)8692(Top 478%)
25.2M25.20 mi0.35 mi21435-208593-168593-1621968(Top 83%)9111(Top 80%)9111(Top 501%)
Finish26.22 mi1.02 mi21491-568632-398632-3922879(Top 86%)9590(Top 84%)9590(Top 528%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 78%
×21story building
+97ft-345ft

Overall

20810

Females

8133

F45-49

8133

5K→10K

3.1 - 6.2 mi

Top 78%
×5story building
+79ft-138ft

Overall

20759

Females

8126

F45-49

8126

10K→15K

6.2 - 9.3 mi

Top 78%
×3story building
+67ft-78ft

Overall

20810

Females

8133

F45-49

8133

15K→20K

9.3 - 12.4 mi

Top 79%
×5story building
+106ft-86ft

Overall

21003

Females

8234

F45-49

8234

20K→Half

12.4 - 13.1 mi

Top 81%
×2story building
+19ft-37ft

Overall

21480

Females

8509

F45-49

8509

Half→25K

13.1 - 15.5 mi

Top 79%
×4story building
+66ft-88ft

Overall

20933

Females

8234

F45-49

8234

25K→30K

15.5 - 18.6 mi

Top 79%
×9story building
+181ft-148ft

Overall

20994

Females

8340

F45-49

8340

30K→20M

18.6 - 20.0 mi

Top 84%
×5story building
+64ft-50ft

Overall

22248

Females

9113

F45-49

9113

20M→21M

20.0 - 21.0 mi

Top 84%
×8story building
+106ft-24ft

Overall

22264

Females

9144

F45-49

9144

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

22982

Females

9580

F45-49

9580

35K→23M

21.8 - 23.0 mi

Top 86%
×5story building
+23ft-63ft

Overall

22876

Females

9523

F45-49

9523

23M→24M

23.0 - 24.0 mi

Top 88%
×6story building
+12ft-82ft

Overall

23472

Females

9881

F45-49

9881

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

21145

Females

8692

F45-49

8692

40K→25.2M

24.9 - 25.2 mi

Top 83%
×1story
+13ft-16ft

Overall

21968

Females

9111

F45-49

9111

25.2M→Finish

25.2 - 26.2 mi

Top 86%
×2story building
+22ft-21ft

Overall

22879

Females

9590

F45-49

9590

Passing Analysis

Category:
Athletes Passed
1000
Passed By
2005
Net Change
-1005
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20486
5K → 10K245365-120#20486#20606
10K → 15K169192-23#20606#20629
15K → 20K127217-90#20629#20719
20K → Half1566-51#20719#20770
Half → 25K78126-48#20770#20818
25K → 30K146157-11#20818#20829
30K → 20M42170-128#20829#20957
20M → 21M33130-97#20957#21054
21M → 35K16114-98#21054#21152
35K → 23M30167-137#21152#21289
23M → 24M14148-134#21289#21423
24M → 40K4941+8#21423#21415
40K → 25.2M1131-20#21415#21435
25.2M → Finish2581-56#21435#21491
TOTALS10002005-1005
📊

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