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BOSTON MARATHON 2023

Allison Nielsen

Bib: 14566•F

NE

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 47%
Gender (Female)
#0 / 11423
Top 30%
Masters (Masters Women)
#0 / 6539
Top 17%
Division (F40-44)
#0 / 1878
Top 32%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:06
Rank: #14559
Start → 5K
25:06 | 8:05/mi
10K· 6.21 mi
49:41
Rank: #14361 (+198)
5K → 10K
24:35 | 7:55/mi
15K· 9.32 mi
1:14:16
Rank: #14122 (+239)
10K → 15K
24:35 | 7:55/mi
20K· 12.43 mi
1:39:04
Rank: #13874 (+248)
15K → 20K
24:48 | 7:59/mi
Half· 13.11 mi
1:44:26
Rank: #13835 (+39)
20K → Half
5:22 | 7:52/mi
25K· 15.53 mi
2:04:02
Rank: #13749 (+86)
Half → 25K
19:36 | 8:05/mi
30K· 18.64 mi
2:29:07
Rank: #13297 (+452)
25K → 30K
25:05 | 8:04/mi
20M
2:40:06
Rank: #13091 (+206)
30K → 20M
10:59 | 8:05/mi
21M
2:48:40
Rank: #12917 (+174)
20M → 21M
8:34 | 8:34/mi
35K· 21.75 mi
2:54:37
Rank: #12860 (+57)
21M → 35K
5:57 | 7:57/mi
23M
3:04:54
Rank: #12746 (+114)
35K → 23M
10:17 | 8:13/mi
24M
3:12:58
Rank: #12691 (+55)
23M → 24M
8:04 | 8:04/mi
40K· 24.85 mi
3:19:56
Rank: #12623 (+68)
24M → 40K
6:58 | 8:09/mi
25.2M
3:22:58
Rank: #12605 (+18)
40K → 25.2M
3:02 | 8:48/mi
Finish· 26.22 mi
3:31:04
Rank: #12560 (+45)
25.2M → Finish
8:06 | 7:57/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:26
Pace7:58 /mi
2nd Half
Distance13.11 mi
Time1:46:38
Pace8:08 /mi
📊Positive Split: 2.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:3825:068:0525:06
8:05
-
10K
6.21 mi11:19:1349:418:0024:35
7:55
-0:10
15K
9.32 mi11:43:481:14:167:5824:35
7:55
0:00
20K
12.43 mi12:08:361:39:047:5824:48
7:59
+0:04
Half
13.11 mi12:13:581:44:267:585:22
7:52
-0:07
25K
15.53 mi12:33:342:04:027:5919:36
8:05
+0:13
30K
18.64 mi12:58:392:29:078:0025:05
8:04
-0:01
20M
20.00 mi13:09:382:40:068:0010:59
8:05
+0:01
21M
21.00 mi13:18:122:48:408:028:34
8:34
+0:29
35K
21.75 mi13:24:092:54:378:025:57
7:57
-0:37
23M
23.00 mi13:34:263:04:548:0210:17
8:13
+0:16
24M
24.00 mi13:42:303:12:588:028:04
8:04
-0:09
40K
24.85 mi13:49:283:19:568:036:58
8:09
+0:05
25.2M
25.20 mi13:52:303:22:588:033:02
8:48
+0:39
Finish
26.22 mi14:00:363:31:048:038:06
7:57
-0:51

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

7:52 /mi

Average Pace

8:03 /mi

Slowest Pace

8:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:28:02

99% of race

Time at Steady Pace

3:02

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:03 /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 mi10:54:3825:068:0525:06
8:05
#14559
10K
6.21 mi11:19:1349:418:0024:35
7:55
#14361
15K
9.32 mi11:43:481:14:167:5824:35
7:55
#14122
20K
12.43 mi12:08:361:39:047:5824:48
7:59
#13874
Half
13.11 mi12:13:581:44:267:585:22
7:52
#13835
25K
15.53 mi12:33:342:04:027:5919:36
8:05
#13749
30K
18.64 mi12:58:392:29:078:0025:05
8:04
#13297
20M
20.00 mi13:09:382:40:068:0010:59
8:05
#13091
21M
21.00 mi13:18:122:48:408:028:34
8:34
#12917
35K
21.75 mi13:24:092:54:378:025:57
7:57
#12860
23M
23.00 mi13:34:263:04:548:0210:17
8:13
#12746
24M
24.00 mi13:42:303:12:588:028:04
8:04
#12691
40K
24.85 mi13:49:283:19:568:036:58
8:09
#12623
25.2M
25.20 mi13:52:303:22:588:033:02
8:48
#12605
Finish
26.22 mi14:00:363:31:048:038:06
7:57
#12560
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi145594359435913679(Top 51%)3885(Top 34%)3885(Top 207%)
10K6.21 mi3.10 mi14361+1984260+994260+9914084(Top 53%)4098(Top 36%)4098(Top 218%)
15K9.32 mi3.11 mi14122+2394134+1264134+12613679(Top 51%)3885(Top 34%)3885(Top 207%)
20K12.43 mi3.11 mi13874+2484009+1254009+12513283(Top 50%)3697(Top 32%)3697(Top 197%)
Half13.11 mi0.68 mi13835+393985+243985+2413346(Top 50%)3695(Top 32%)3695(Top 197%)
25K15.53 mi2.42 mi13749+863955+303955+3013407(Top 50%)3862(Top 34%)3862(Top 206%)
30K18.64 mi3.11 mi13297+4523726+2293726+22911483(Top 43%)2897(Top 25%)2897(Top 154%)
20M20.00 mi1.36 mi13091+2063617+1093617+10910926(Top 41%)2706(Top 24%)2706(Top 144%)
21M21.00 mi1.00 mi12917+1743536+813536+8110904(Top 41%)2820(Top 25%)2820(Top 150%)
35K21.75 mi0.75 mi12860+573525+113525+1111828(Top 44%)3335(Top 29%)3335(Top 178%)
23M23.00 mi1.25 mi12746+1143480+453480+4511303(Top 42%)3164(Top 28%)3164(Top 168%)
24M24.00 mi1.00 mi12691+553466+143466+1411725(Top 44%)3444(Top 30%)3444(Top 183%)
40K24.85 mi0.85 mi12623+683443+233443+2311050(Top 42%)3175(Top 28%)3175(Top 169%)
25.2M25.20 mi0.35 mi12605+183444-13444-111387(Top 43%)3399(Top 30%)3399(Top 181%)
Finish26.22 mi1.02 mi12560+453443+13443+111761(Top 44%)3581(Top 31%)3581(Top 191%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21stories
+97ft-345ft

Overall

13679

Females

3885

F40-44

3885

5K→10K

3.1 - 6.2 mi

Top 53%
×5stories
+79ft-138ft

Overall

14084

Females

4098

F40-44

4098

10K→15K

6.2 - 9.3 mi

Top 51%
×3stories
+67ft-78ft

Overall

13679

Females

3885

F40-44

3885

15K→20K

9.3 - 12.4 mi

Top 50%
×5stories
+106ft-86ft

Overall

13283

Females

3697

F40-44

3697

20K→Half

12.4 - 13.1 mi

Top 50%
×2stories
+19ft-37ft

Overall

13346

Females

3695

F40-44

3695

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

13407

Females

3862

F40-44

3862

25K→30K

15.5 - 18.6 mi

Top 43%
×9stories
+181ft-148ft

Overall

11483

Females

2897

F40-44

2897

30K→20M

18.6 - 20.0 mi

Top 41%
×5stories
+64ft-50ft

Overall

10926

Females

2706

F40-44

2706

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

10904

Females

2820

F40-44

2820

21M→35K

21.0 - 21.8 mi

Top 44%
×7stories
+17ft-86ft

Overall

11828

Females

3335

F40-44

3335

35K→23M

21.8 - 23.0 mi

Top 42%
×5stories
+23ft-63ft

Overall

11303

Females

3164

F40-44

3164

23M→24M

23.0 - 24.0 mi

Top 44%
×6stories
+12ft-82ft

Overall

11725

Females

3444

F40-44

3444

24M→40K

24.0 - 24.9 mi

Top 42%
×1story
+6ft-20ft

Overall

11050

Females

3175

F40-44

3175

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

11387

Females

3399

F40-44

3399

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2stories
+22ft-21ft

Overall

11761

Females

3581

F40-44

3581

Passing Analysis

Category:
Athletes Passed
2698
Passed By
699
Net Change
+1999
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14559
5K → 10K407209+198#14559#14361
10K → 15K32687+239#14361#14122
15K → 20K30860+248#14122#13874
20K → Half5314+39#13874#13835
Half → 25K16983+86#13835#13749
25K → 30K48129+452#13749#13297
30K → 20M2148+206#13297#13091
20M → 21M19824+174#13091#12917
21M → 35K8124+57#12917#12860
35K → 23M14026+114#12860#12746
23M → 24M9742+55#12746#12691
24M → 40K9426+68#12691#12623
40K → 25.2M3618+18#12623#12605
25.2M → Finish9449+45#12605#12560
TOTALS2698699+1999
📊

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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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing