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BOSTON MARATHON 2026

Tatjana Sefer

Bib: 23169•F

NH

0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Masters (Masters Women)
#0 / 6862
Top 41%
Division (F50-54)
#0 / 1233
Top 37%
Race Day Weather
51°/41°F
overcast clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:57
Rank: #19218
Start → 5K
25:57 | 8:22/mi
10K· 6.21 mi
51:38
Rank: #19077 (+141)
5K → 10K
25:41 | 8:16/mi
15K· 9.32 mi
1:17:20
Rank: #18999 (+78)
10K → 15K
25:42 | 8:17/mi
20K· 12.43 mi
1:43:30
Rank: #18937 (+62)
15K → 20K
26:10 | 8:26/mi
HALF· 13.11 mi
1:49:08
Rank: #18925 (+12)
20K → HALF
5:38 | 8:16/mi
25K· 15.53 mi
2:09:58
Rank: #18946 (-21)
HALF → 25K
20:50 | 8:36/mi
30K· 18.64 mi
2:37:09
Rank: #18788 (+158)
25K → 30K
27:11 | 8:45/mi
20M
2:49:01
Rank: #18684 (+104)
30K → 20M
11:52 | 8:45/mi
21M
2:58:21
Rank: #18614 (+70)
20M → 21M
9:20 | 9:20/mi
35K· 21.75 mi
3:04:18
Rank: #18460 (+154)
21M → 35K
5:57 | 7:58/mi
23M
3:14:48
Rank: #18265 (+195)
35K → 23M
10:30 | 8:24/mi
24M
3:23:01
Rank: #18135 (+130)
23M → 24M
8:13 | 8:13/mi
40K· 24.85 mi
3:30:07
Rank: #17974 (+161)
24M → 40K
7:06 | 8:19/mi
25.2M
3:33:17
Rank: #17927 (+47)
40K → 25.2M
3:10 | 9:11/mi
FINISH· 26.22 mi
3:41:21
Rank: #17789 (+138)
25.2M → FINISH
8:04 | 7:55/mi

The Course

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Half Splits

1st Half· via HALFFaster
Distance13.11 mi
Time1:49:08
Pace8:20 /mi
2nd Half
Distance13.11 mi
Time1:52:13
Pace8:34 /mi
📊Positive Split: 2.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:28:3125:578:2225:57
8:22
-
10K
6.21 mi11:54:1251:388:1925:41
8:16
-0:06
15K
9.32 mi12:19:541:17:208:1825:42
8:17
+0:01
20K
12.43 mi12:46:041:43:308:2026:10
8:26
+0:09
HALF
13.11 mi12:51:421:49:088:205:38
8:16
-0:10
25K
15.53 mi13:12:322:09:588:2220:50
8:36
+0:20
30K
18.64 mi13:39:432:37:098:2627:11
8:45
+0:09
20M
20.00 mi13:51:352:49:018:2811:52
8:45
0:00
21M
21.00 mi14:00:552:58:218:309:20
9:20
+0:35
35K
21.75 mi14:06:523:04:188:295:57
7:58
-1:22
23M
23.00 mi14:17:223:14:488:2910:30
8:24
+0:26
24M
24.00 mi14:25:353:23:018:288:13
8:13
-0:11
40K
24.85 mi14:32:413:30:078:287:06
8:19
+0:06
25.2M
25.20 mi14:35:513:33:178:283:10
9:11
+0:52
FINISH
26.22 mi14:43:553:41:218:278:04
7:55
-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

7:55 /mi

Average Pace

8:27 /mi

Slowest Pace

9:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:49:48

77% of race

Time at Steady Pace

51:33

23% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:27 /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 mi11:28:3125:578:2225:57
8:22
#19218
10K
6.21 mi11:54:1251:388:1925:41
8:16
#19077
15K
9.32 mi12:19:541:17:208:1825:42
8:17
#18999
20K
12.43 mi12:46:041:43:308:2026:10
8:26
#18937
HALF
13.11 mi12:51:421:49:088:205:38
8:16
#18925
25K
15.53 mi13:12:322:09:588:2220:50
8:36
#18946
30K
18.64 mi13:39:432:37:098:2627:11
8:45
#18788
20M
20.00 mi13:51:352:49:018:2811:52
8:45
#18684
21M
21.00 mi14:00:552:58:218:309:20
9:20
#18614
35K
21.75 mi14:06:523:04:188:295:57
7:58
#18460
23M
23.00 mi14:17:223:14:488:2910:30
8:24
#18265
24M
24.00 mi14:25:353:23:018:288:13
8:13
#18135
40K
24.85 mi14:32:413:30:078:287:06
8:19
#17974
25.2M
25.20 mi14:35:513:33:178:283:10
9:11
#17927
FINISH
26.22 mi14:43:553:41:218:278:04
7:55
#17789
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi192187206720618818(Top 65%)6931(Top 55%)6931(Top 562%)
10K6.21 mi3.10 mi19077+1417112+947112+9418973(Top 65%)7013(Top 56%)7013(Top 569%)
15K9.32 mi3.11 mi18999+787052+607052+6018818(Top 65%)6931(Top 55%)6931(Top 562%)
20K12.43 mi3.11 mi18937+627024+287024+2818865(Top 65%)6998(Top 56%)6998(Top 568%)
HALF13.11 mi0.68 mi18925+127019+57019+518825(Top 65%)6947(Top 55%)6947(Top 563%)
25K15.53 mi2.42 mi18946-217042-237042-2319123(Top 66%)7185(Top 57%)7185(Top 583%)
30K18.64 mi3.11 mi18788+1586991+516991+5118319(Top 63%)6847(Top 54%)6847(Top 555%)
20M20.00 mi1.36 mi18684+1046944+476944+4717604(Top 61%)6532(Top 52%)6532(Top 530%)
21M21.00 mi1.00 mi18614+706915+296915+2917792(Top 61%)6677(Top 53%)6677(Top 542%)
35K21.75 mi0.75 mi18460+1546845+706845+7014237(Top 49%)4786(Top 38%)4786(Top 388%)
23M23.00 mi1.25 mi18265+1956761+846761+8415060(Top 52%)5310(Top 42%)5310(Top 431%)
24M24.00 mi1.00 mi18135+1306710+516710+5115229(Top 52%)5472(Top 44%)5472(Top 444%)
40K24.85 mi0.85 mi17974+1616640+706640+7014531(Top 50%)5187(Top 41%)5187(Top 421%)
25.2M25.20 mi0.35 mi17927+476621+196621+1915792(Top 54%)5865(Top 47%)5865(Top 476%)
FINISH26.22 mi1.02 mi17789+1386569+526569+5214653(Top 50%)5261(Top 42%)5261(Top 427%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21stories
+97ft-345ft

Overall

18818

Females

6931

F50-54

6931

5K→10K

3.1 - 6.2 mi

Top 65%
×5stories
+79ft-138ft

Overall

18973

Females

7013

F50-54

7013

10K→15K

6.2 - 9.3 mi

Top 65%
×3stories
+67ft-78ft

Overall

18818

Females

6931

F50-54

6931

15K→20K

9.3 - 12.4 mi

Top 65%
×5stories
+106ft-86ft

Overall

18865

Females

6998

F50-54

6998

20K→HALF

12.4 - 13.1 mi

Top 65%
×2stories
+19ft-37ft

Overall

18825

Females

6947

F50-54

6947

HALF→25K

13.1 - 15.5 mi

Top 66%
×4stories
+66ft-88ft

Overall

19123

Females

7185

F50-54

7185

25K→30K

15.5 - 18.6 mi

Top 63%
×9stories
+181ft-148ft

Overall

18319

Females

6847

F50-54

6847

30K→20M

18.6 - 20.0 mi

Top 61%
×5stories
+64ft-50ft

Overall

17604

Females

6532

F50-54

6532

20M→21M

20.0 - 21.0 mi

Top 61%
×8stories
+106ft-24ft

Overall

17792

Females

6677

F50-54

6677

21M→35K

21.0 - 21.8 mi

Top 49%
×7stories
+17ft-86ft

Overall

14237

Females

4786

F50-54

4786

35K→23M

21.8 - 23.0 mi

Top 52%
×5stories
+23ft-63ft

Overall

15060

Females

5310

F50-54

5310

23M→24M

23.0 - 24.0 mi

Top 52%
×6stories
+12ft-82ft

Overall

15229

Females

5472

F50-54

5472

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

14531

Females

5187

F50-54

5187

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

15792

Females

5865

F50-54

5865

25.2M→FINISH

25.2 - 26.2 mi

Top 50%
×2stories
+22ft-21ft

Overall

14653

Females

5261

F50-54

5261

Passing Analysis

Category:
Athletes Passed
2294
Passed By
865
Net Change
+1429
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19218
5K → 10K344203+141#19218#19077
10K → 15K211133+78#19077#18999
15K → 20K181119+62#18999#18937
20K → HALF3826+12#18937#18925
HALF → 25K118139-21#18925#18946
25K → 30K269111+158#18946#18788
30K → 20M13430+104#18788#18684
20M → 21M12252+70#18684#18614
21M → 35K1551+154#18614#18460
35K → 23M20813+195#18460#18265
23M → 24M1377+130#18265#18135
24M → 40K17110+161#18135#17974
40K → 25.2M547+47#17974#17927
25.2M → FINISH15214+138#17927#17789
TOTALS2294865+1429
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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OTQ

Olympic Trials Qualifying analysis available

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing