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BOSTON MARATHON 2023

Marilyn Tarkalson

Bib: 18879•F

ID

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 37%
Masters (Masters Women)
#0 / 6539
Top 23%
Division (F45-49)
#0 / 1817
Top 25%
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
7:57/mi
24:41
↑ 97↓ 3451.5%
10K· 6.21 mi
7:55/mi
49:18
↑ 79↓ 1380.4%
15K· 9.32 mi
7:57/mi
1:13:59
↑ 67↓ 78
20K· 12.43 mi
8:04/mi
1:39:03
↑ 106↓ 860.1%
Half· 13.11 mi
8:01/mi
1:44:31
↑ 19↓ 370.5%
25K· 15.53 mi
8:05/mi
2:04:08
↑ 66↓ 880.2%
30K· 18.64 mi
8:18/mi
2:29:56
↑ 181↓ 1480.2%
20M
8:23/mi
2:41:20
↑ 64↓ 500.2%
21M
9:17/mi
2:50:37
↑ 106↓ 241.6%
35K· 21.75 mi
8:17/mi
2:56:49
↑ 17↓ 861.7%
23M
8:42/mi
3:07:42
↑ 23↓ 630.6%
24M
8:16/mi
3:15:58
↓ 821.3%
40K· 24.85 mi
8:38/mi
3:23:21
↓ 200.3%
25.2M
9:34/mi
3:26:39
↑ 13↓ 160.2%
Finish· 26.22 mi
8:48/mi
3:35:37
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:31
Pace7:58 /mi
2nd Half
Distance13.11 mi
Time1:51:06
Pace8:29 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:4324:417:5724:41
7:57
-
10K
6.21 mi11:40:2049:187:5624:37
7:55
-0:02
15K
9.32 mi12:05:011:13:597:5624:41
7:57
+0:02
20K
12.43 mi12:30:051:39:037:5825:04
8:04
+0:07
Half
13.11 mi12:35:331:44:317:585:28
8:01
-0:03
25K
15.53 mi12:55:102:04:087:5919:37
8:05
+0:04
30K
18.64 mi13:20:582:29:568:0325:48
8:18
+0:13
20M
20.00 mi13:32:222:41:208:0411:24
8:23
+0:05
21M
21.00 mi13:41:392:50:378:079:17
9:17
+0:54
35K
21.75 mi13:47:512:56:498:086:12
8:17
-1:00
23M
23.00 mi13:58:443:07:428:1010:53
8:42
+0:25
24M
24.00 mi14:07:003:15:588:108:16
8:16
-0:26
40K
24.85 mi14:14:233:23:218:117:23
8:38
+0:22
25.2M
25.20 mi14:17:413:26:398:123:18
9:34
+0:56
Finish
26.22 mi14:26:393:35:378:148:58
8:48
-0:46

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

8:14 /mi

Slowest Pace

9:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:19:27

37% of race

Time at Steady Pace

1:36:21

45% of race

Time at Slower Pace

39:49

18% of race

Average Pace: 8:13 /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 mi11:15:4324:417:5724:41
7:57
#13627
10K
6.21 mi11:40:2049:187:5624:37
7:55
#13859
15K
9.32 mi12:05:011:13:597:5624:41
7:57
#13893
20K
12.43 mi12:30:051:39:037:5825:04
8:04
#13867
Half
13.11 mi12:35:331:44:317:585:28
8:01
#13887
25K
15.53 mi12:55:102:04:087:5919:37
8:05
#13796
30K
18.64 mi13:20:582:29:568:0325:48
8:18
#13624
20M
20.00 mi13:32:222:41:208:0411:24
8:23
#13568
21M
21.00 mi13:41:392:50:378:079:17
9:17
#13648
35K
21.75 mi13:47:512:56:498:086:12
8:17
#13651
23M
23.00 mi13:58:443:07:428:1010:53
8:42
#13675
24M
24.00 mi14:07:003:15:588:108:16
8:16
#13625
40K
24.85 mi14:14:233:23:218:117:23
8:38
#13625
25.2M
25.20 mi14:17:413:26:398:123:18
9:34
#13657
Finish
26.22 mi14:26:393:35:378:148:58
8:48
#13811
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi136273801380113967(Top 52%)4066(Top 36%)4066(Top 224%)
10K6.21 mi3.10 mi13859-2323955-1543955-15414203(Top 53%)4181(Top 37%)4181(Top 230%)
15K9.32 mi3.11 mi13893-343994-393994-3913967(Top 52%)4066(Top 36%)4066(Top 224%)
20K12.43 mi3.11 mi13867+264002-84002-814006(Top 53%)4113(Top 36%)4113(Top 226%)
Half13.11 mi0.68 mi13887-204017-154017-1514528(Top 55%)4397(Top 38%)4397(Top 242%)
25K15.53 mi2.42 mi13796+913986+313986+3113465(Top 51%)3904(Top 34%)3904(Top 215%)
30K18.64 mi3.11 mi13624+1723913+733913+7313067(Top 49%)3796(Top 33%)3796(Top 209%)
20M20.00 mi1.36 mi13568+563904+93904+912985(Top 49%)3854(Top 34%)3854(Top 212%)
21M21.00 mi1.00 mi13648-803962-583962-5814904(Top 56%)4993(Top 44%)4993(Top 275%)
35K21.75 mi0.75 mi13651-33977-153977-1514043(Top 53%)4579(Top 40%)4579(Top 252%)
23M23.00 mi1.25 mi13675-244023-464023-4614344(Top 54%)4817(Top 42%)4817(Top 265%)
24M24.00 mi1.00 mi13625+504015+84015+813086(Top 49%)4175(Top 37%)4175(Top 230%)
40K24.85 mi0.85 mi136254035-204035-2014175(Top 53%)4837(Top 42%)4837(Top 266%)
25.2M25.20 mi0.35 mi13657-324061-264061-2615519(Top 58%)5580(Top 49%)5580(Top 307%)
Finish26.22 mi1.02 mi13811-1544178-1174178-11717039(Top 64%)6391(Top 56%)6391(Top 352%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21story building
+97ft-345ft

Overall

13967

Females

4066

F45-49

4066

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

14203

Females

4181

F45-49

4181

10K→15K

6.2 - 9.3 mi

Top 52%
×3story building
+67ft-78ft

Overall

13967

Females

4066

F45-49

4066

15K→20K

9.3 - 12.4 mi

Top 53%
×5story building
+106ft-86ft

Overall

14006

Females

4113

F45-49

4113

20K→Half

12.4 - 13.1 mi

Top 55%
×2story building
+19ft-37ft

Overall

14528

Females

4397

F45-49

4397

Half→25K

13.1 - 15.5 mi

Top 51%
×4story building
+66ft-88ft

Overall

13465

Females

3904

F45-49

3904

25K→30K

15.5 - 18.6 mi

Top 49%
×9story building
+181ft-148ft

Overall

13067

Females

3796

F45-49

3796

30K→20M

18.6 - 20.0 mi

Top 49%
×5story building
+64ft-50ft

Overall

12985

Females

3854

F45-49

3854

20M→21M

20.0 - 21.0 mi

Top 56%
×8story building
+106ft-24ft

Overall

14904

Females

4993

F45-49

4993

21M→35K

21.0 - 21.8 mi

Top 53%
×7story building
+17ft-86ft

Overall

14043

Females

4579

F45-49

4579

35K→23M

21.8 - 23.0 mi

Top 54%
×5story building
+23ft-63ft

Overall

14344

Females

4817

F45-49

4817

23M→24M

23.0 - 24.0 mi

Top 49%
×6story building
+12ft-82ft

Overall

13086

Females

4175

F45-49

4175

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

14175

Females

4837

F45-49

4837

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

15519

Females

5580

F45-49

5580

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2story building
+22ft-21ft

Overall

17039

Females

6391

F45-49

6391

Passing Analysis

Category:
Athletes Passed
1536
Passed By
1720
Net Change
-184
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13627
5K → 10K182414-232#13627#13859
10K → 15K162196-34#13859#13893
15K → 20K194168+26#13893#13867
20K → Half2949-20#13867#13887
Half → 25K16574+91#13887#13796
25K → 30K27098+172#13796#13624
30K → 20M12367+56#13624#13568
20M → 21M71151-80#13568#13648
21M → 35K5053-3#13648#13651
35K → 23M76100-24#13651#13675
23M → 24M9343+50#13675#13625
24M → 40K69690#13625#13625
40K → 25.2M2557-32#13625#13657
25.2M → Finish27181-154#13657#13811
TOTALS15361720-184
📊

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