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BOSTON MARATHON 2026

Erin Tremblay

Bib: 21441•F

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0:00
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Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Masters (Masters Women)
#0 / 6862
Age Group (F45-49)
#0 / 1786
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
25:52
3.11 mi
Rank: #19053
Start → 5K
25:52 | 8:20/mi
10K
51:59
6.21 mi
Rank: #19423 (-370)
5K → 10K
26:07 | 8:25/mi
15K
1:21:19
9.32 mi
Rank: #21397 (-1974)
10K → 15K
29:20 | 9:27/mi
20K
1:48:17
12.43 mi
Rank: #21109 (+288)
15K → 20K
26:58 | 8:41/mi
HALF
1:54:13
13.11 mi
Rank: #21118 (-9)
20K → HALF
5:56 | 8:43/mi
25K
2:19:41
15.53 mi
Rank: #22223 (-1105)
HALF → 25K
25:28 | 10:31/mi
30K
2:53:25
18.64 mi
Rank: #23003 (-780)
25K → 30K
33:44 | 10:52/mi
20M
3:13:10
20.00 mi
Rank: #23894 (-891)
30K → 20M
19:45 | 14:33/mi
21M
3:26:44
21.00 mi
Rank: #24194 (-300)
20M → 21M
13:34 | 13:34/mi
35K
3:35:46
21.75 mi
Rank: #24344 (-150)
21M → 35K
9:02 | 12:05/mi
23M
3:50:17
23.00 mi
Rank: #24450 (-106)
35K → 23M
14:31 | 11:36/mi
24M
4:01:55
24.00 mi
Rank: #24531 (-81)
23M → 24M
11:38 | 11:38/mi
40K
4:12:01
24.85 mi
Rank: #24579 (-48)
24M → 40K
10:06 | 11:49/mi
25.2M
4:16:04
25.20 mi
Rank: #24577 (+2)
40K → 25.2M
4:03 | 11:45/mi
FINISH
4:25:12
26.22 mi
Rank: #24432 (+145)
25.2M → FINISH
9:08 | 8:58/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:54:13
Pace8:43 /mi
2nd Half
Distance13.11 mi
Time2:30:59
Pace11:32 /mi
📊Positive Split: 32.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:27:1825:528:2025:52
8:20
-
10K
6.21 mi11:53:2551:598:2226:07
8:25
+0:05
15K
9.32 mi12:22:451:21:198:4429:20
9:27
+1:02
20K
12.43 mi12:49:431:48:178:4326:58
8:41
-0:46
HALF
13.11 mi12:55:391:54:138:435:56
8:43
+0:02
25K
15.53 mi13:21:072:19:419:0025:28
10:31
+1:48
30K
18.64 mi13:54:512:53:259:1933:44
10:52
+0:21
20M
20.00 mi14:14:363:13:109:4019:45
14:33
+3:41
21M
21.00 mi14:28:103:26:449:5113:34
13:34
-0:59
35K
21.75 mi14:37:123:35:469:569:02
12:05
-1:29
23M
23.00 mi14:51:433:50:1710:0114:31
11:36
-0:29
24M
24.00 mi15:03:214:01:5510:0511:38
11:38
+0:02
40K
24.85 mi15:13:274:12:0110:0910:06
11:49
+0:11
25.2M
25.20 mi15:17:304:16:0410:104:03
11:45
-0:04
FINISH
26.22 mi15:26:384:25:1210:089:08
8:58
-2:47

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

8:20 /mi

Average Pace

10:07 /mi

Slowest Pace

14:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:03:21

47% of race

Time at Steady Pace

1:29:24

34% of race

Time at Slower Pace

52:27

20% of race

Average Pace: 10:07 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:27:1825:528:2025:52
8:20
#19053
10K
6.21 mi11:53:2551:598:2226:07
8:25
#19423
15K
9.32 mi12:22:451:21:198:4429:20
9:27
#21397
20K
12.43 mi12:49:431:48:178:4326:58
8:41
#21109
HALF
13.11 mi12:55:391:54:138:435:56
8:43
#21118
25K
15.53 mi13:21:072:19:419:0025:28
10:31
#22223
30K
18.64 mi13:54:512:53:259:1933:44
10:52
#23003
20M
20.00 mi14:14:363:13:109:4019:45
14:33
#23894
21M
21.00 mi14:28:103:26:449:5113:34
13:34
#24194
35K
21.75 mi14:37:123:35:469:569:02
12:05
#24344
23M
23.00 mi14:51:433:50:1710:0114:31
11:36
#24450
24M
24.00 mi15:03:214:01:5510:0511:38
11:38
#24531
40K
24.85 mi15:13:274:12:0110:0910:06
11:49
#24579
25.2M
25.20 mi15:17:304:16:0410:104:03
11:45
#24577
FINISH
26.22 mi15:26:384:25:1210:089:08
8:58
#24432
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi190537121712124271(Top 84%)9803(Top 78%)9803(Top 549%)
10K6.21 mi3.10 mi19423-3707302-1817302-18119828(Top 68%)7501(Top 60%)7501(Top 420%)
15K9.32 mi3.11 mi21397-19748357-10558357-105524271(Top 84%)9803(Top 78%)9803(Top 549%)
20K12.43 mi3.11 mi21109+2888210+1478210+14720349(Top 70%)7818(Top 62%)7818(Top 438%)
HALF13.11 mi0.68 mi21118-98219-98219-921413(Top 74%)8340(Top 66%)8340(Top 467%)
25K15.53 mi2.42 mi22223-11058775-5568775-55625449(Top 88%)10491(Top 83%)10491(Top 587%)
30K18.64 mi3.11 mi23003-7809204-4299204-42925067(Top 86%)10406(Top 83%)10406(Top 583%)
20M20.00 mi1.36 mi23894-8919654-4509654-45028421(Top 98%)12268(Top 98%)12268(Top 687%)
21M21.00 mi1.00 mi24194-3009827-1739827-17326942(Top 93%)11526(Top 92%)11526(Top 645%)
35K21.75 mi0.75 mi24344-1509915-889915-8826806(Top 92%)11464(Top 91%)11464(Top 642%)
23M23.00 mi1.25 mi24450-1069981-669981-6625575(Top 88%)10856(Top 86%)10856(Top 608%)
24M24.00 mi1.00 mi24531-8110049-6810049-6826123(Top 90%)11173(Top 89%)11173(Top 626%)
40K24.85 mi0.85 mi24579-4810085-3610085-3625610(Top 88%)10947(Top 87%)10947(Top 613%)
25.2M25.20 mi0.35 mi24577+210090-510090-524000(Top 83%)10144(Top 81%)10144(Top 568%)
FINISH26.22 mi1.02 mi24432+14510037+5310037+5320399(Top 70%)8292(Top 66%)8292(Top 464%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 84%
×21
+97ft-345ft

Overall

24271

Females

9803

F45-49

9803

5K→10K

3.1 - 6.2 mi

Top 68%
×5
+79ft-138ft

Overall

19828

Females

7501

F45-49

7501

10K→15K

6.2 - 9.3 mi

Top 84%
×3
+67ft-78ft

Overall

24271

Females

9803

F45-49

9803

15K→20K

9.3 - 12.4 mi

Top 70%
×5
+106ft-86ft

Overall

20349

Females

7818

F45-49

7818

20K→HALF

12.4 - 13.1 mi

Top 74%
×2
+19ft-37ft

Overall

21413

Females

8340

F45-49

8340

HALF→25K

13.1 - 15.5 mi

Top 88%
×4
+66ft-88ft

Overall

25449

Females

10491

F45-49

10491

25K→30K

15.5 - 18.6 mi

Top 86%
×9
+181ft-148ft

Overall

25067

Females

10406

F45-49

10406

30K→20M

18.6 - 20.0 mi

Top 98%
×5
+64ft-50ft

Overall

28421

Females

12268

F45-49

12268

20M→21M

20.0 - 21.0 mi

Top 93%
×8
+106ft-24ft

Overall

26942

Females

11526

F45-49

11526

21M→35K

21.0 - 21.8 mi

Top 92%
×7
+17ft-86ft

Overall

26806

Females

11464

F45-49

11464

35K→23M

21.8 - 23.0 mi

Top 88%
×5
+23ft-63ft

Overall

25575

Females

10856

F45-49

10856

23M→24M

23.0 - 24.0 mi

Top 90%
×6
+12ft-82ft

Overall

26123

Females

11173

F45-49

11173

24M→40K

24.0 - 24.9 mi

Top 88%
×1
+6ft-20ft

Overall

25610

Females

10947

F45-49

10947

40K→25.2M

24.9 - 25.2 mi

Top 83%
×1
+13ft-16ft

Overall

24000

Females

10144

F45-49

10144

25.2M→FINISH

25.2 - 26.2 mi

Top 70%
×2
+22ft-21ft

Overall

20399

Females

8292

F45-49

8292

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
806*
Passed By
1774
Net Change
-5379
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19053
5K → 10K121200-370#19053#19423
10K → 15K3200-1974#19423#21397
15K → 20K327*39+288#21397#21109
20K → HALF2534-9#21109#21118
HALF → 25K10200-1105#21118#22223
25K → 30K38200-780#22223#23003
30K → 20M6200-891#23003#23894
20M → 21M13200-300#23894#24194
21M → 35K5155-150#24194#24344
35K → 23M25131-106#24344#24450
23M → 24M30111-81#24450#24531
24M → 40K3280-48#24531#24579
40K → 25.2M2220+2#24579#24577
25.2M → FINISH1494+145#24577#24432
TOTALS806*1774-5379

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing