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BOSTON MARATHON 2023

Joy Koblenzer

Bib: 23158•F

TX

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
29:08
Rank: #21754
Start → 5K
29:08 | 9:23/mi
10K· 6.21 mi
58:26
Rank: #22065 (-311)
5K → 10K
29:18 | 9:26/mi
15K· 9.32 mi
1:28:18
Rank: #22218 (-153)
10K → 15K
29:52 | 9:37/mi
20K· 12.43 mi
1:57:36
Rank: #21991 (+227)
15K → 20K
29:18 | 9:26/mi
Half· 13.11 mi
2:04:03
Rank: #21984 (+7)
20K → Half
6:27 | 9:27/mi
25K· 15.53 mi
2:27:27
Rank: #21867 (+117)
Half → 25K
23:24 | 9:39/mi
30K· 18.64 mi
2:59:14
Rank: #21810 (+57)
25K → 30K
31:47 | 10:14/mi
20M
3:15:36
Rank: #22110 (-300)
30K → 20M
16:22 | 12:03/mi
21M
3:26:52
Rank: #22065 (+45)
20M → 21M
11:16 | 11:16/mi
35K· 21.75 mi
3:34:11
Rank: #22024 (+41)
21M → 35K
7:19 | 9:47/mi
23M
3:49:03
Rank: #22142 (-118)
35K → 23M
14:52 | 11:52/mi
24M
4:03:03
Rank: #22485 (-343)
23M → 24M
14:00 | 14:00/mi
40K· 24.85 mi
4:11:41
Rank: #22414 (+71)
24M → 40K
8:38 | 10:06/mi
25.2M
4:15:21
Rank: #22370 (+44)
40K → 25.2M
3:40 | 10:38/mi
Finish· 26.22 mi
4:25:03
Rank: #22308 (+62)
25.2M → Finish
9:42 | 9:31/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:04:03
Pace9:28 /mi
2nd Half
Distance13.11 mi
Time2:21:00
Pace10:45 /mi
📊Positive Split: 13.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:4729:089:2329:08
9:23
-
10K
6.21 mi11:53:0558:269:2429:18
9:26
+0:03
15K
9.32 mi12:22:571:28:189:2829:52
9:37
+0:11
20K
12.43 mi12:52:151:57:369:2829:18
9:26
-0:11
Half
13.11 mi12:58:422:04:039:286:27
9:27
+0:01
25K
15.53 mi13:22:062:27:279:3023:24
9:39
+0:12
30K
18.64 mi13:53:532:59:149:3731:47
10:14
+0:35
20M
20.00 mi14:10:153:15:369:4716:22
12:03
+1:49
21M
21.00 mi14:21:313:26:529:5111:16
11:16
-0:47
35K
21.75 mi14:28:503:34:119:517:19
9:47
-1:29
23M
23.00 mi14:43:423:49:039:5814:52
11:52
+2:05
24M
24.00 mi14:57:424:03:0310:0814:00
14:00
+2:08
40K
24.85 mi15:06:204:11:4110:088:38
10:06
-3:54
25.2M
25.20 mi15:10:004:15:2110:083:40
10:38
+0:32
Finish
26.22 mi15:19:424:25:0310:079:42
9:31
-1:07

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

9:23 /mi

Average Pace

10:07 /mi

Slowest Pace

14:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:24:53

77% of race

Time at Slower Pace

1:00:10

23% 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

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:23:4729:089:2329:08
9:23
#21754
10K
6.21 mi11:53:0558:269:2429:18
9:26
#22065
15K
9.32 mi12:22:571:28:189:2829:52
9:37
#22218
20K
12.43 mi12:52:151:57:369:2829:18
9:26
#21991
Half
13.11 mi12:58:422:04:039:286:27
9:27
#21984
25K
15.53 mi13:22:062:27:279:3023:24
9:39
#21867
30K
18.64 mi13:53:532:59:149:3731:47
10:14
#21810
20M
20.00 mi14:10:153:15:369:4716:22
12:03
#22110
21M
21.00 mi14:21:313:26:529:5111:16
11:16
#22065
35K
21.75 mi14:28:503:34:119:517:19
9:47
#22024
23M
23.00 mi14:43:423:49:039:5814:52
11:52
#22142
24M
24.00 mi14:57:424:03:0310:0814:00
14:00
#22485
40K
24.85 mi15:06:204:11:4110:088:38
10:06
#22414
25.2M
25.20 mi15:10:004:15:2110:083:40
10:38
#22370
Finish
26.22 mi15:19:424:25:0310:079:42
9:31
#22308
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi217548768876822560(Top 85%)9103(Top 80%)9103(Top 754%)
10K6.21 mi3.10 mi22065-3118889-1218889-12122311(Top 84%)8986(Top 79%)8986(Top 744%)
15K9.32 mi3.11 mi22218-1538946-578946-5722560(Top 85%)9103(Top 80%)9103(Top 754%)
20K12.43 mi3.11 mi21991+2278831+1158831+11521336(Top 80%)8426(Top 74%)8426(Top 698%)
Half13.11 mi0.68 mi21984+78821+108821+1022009(Top 83%)8795(Top 77%)8795(Top 729%)
25K15.53 mi2.42 mi21867+1178752+698752+6921313(Top 80%)8449(Top 74%)8449(Top 700%)
30K18.64 mi3.11 mi21810+578727+258727+2521616(Top 81%)8694(Top 76%)8694(Top 720%)
20M20.00 mi1.36 mi22110-3008908-1818908-18124256(Top 91%)10215(Top 89%)10215(Top 846%)
21M21.00 mi1.00 mi22065+458898+108898+1021420(Top 80%)8698(Top 76%)8698(Top 721%)
35K21.75 mi0.75 mi22024+418876+228876+2220727(Top 78%)8358(Top 73%)8358(Top 692%)
23M23.00 mi1.25 mi22142-1188953-778953-7723820(Top 89%)10014(Top 88%)10014(Top 830%)
24M24.00 mi1.00 mi22485-3439153-2009153-20026077(Top 98%)11203(Top 98%)11203(Top 928%)
40K24.85 mi0.85 mi22414+719121+329121+3220255(Top 76%)8199(Top 72%)8199(Top 679%)
25.2M25.20 mi0.35 mi22370+449101+209101+2019580(Top 74%)7845(Top 69%)7845(Top 650%)
Finish26.22 mi1.02 mi22308+629070+319070+3120219(Top 76%)8136(Top 71%)8136(Top 674%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21stories
+97ft-345ft

Overall

22560

Females

9103

F50-54

9103

5K→10K

3.1 - 6.2 mi

Top 84%
×5stories
+79ft-138ft

Overall

22311

Females

8986

F50-54

8986

10K→15K

6.2 - 9.3 mi

Top 85%
×3stories
+67ft-78ft

Overall

22560

Females

9103

F50-54

9103

15K→20K

9.3 - 12.4 mi

Top 80%
×5stories
+106ft-86ft

Overall

21336

Females

8426

F50-54

8426

20K→Half

12.4 - 13.1 mi

Top 83%
×2stories
+19ft-37ft

Overall

22009

Females

8795

F50-54

8795

Half→25K

13.1 - 15.5 mi

Top 80%
×4stories
+66ft-88ft

Overall

21313

Females

8449

F50-54

8449

25K→30K

15.5 - 18.6 mi

Top 81%
×9stories
+181ft-148ft

Overall

21616

Females

8694

F50-54

8694

30K→20M

18.6 - 20.0 mi

Top 91%
×5stories
+64ft-50ft

Overall

24256

Females

10215

F50-54

10215

20M→21M

20.0 - 21.0 mi

Top 80%
×8stories
+106ft-24ft

Overall

21420

Females

8698

F50-54

8698

21M→35K

21.0 - 21.8 mi

Top 78%
×7stories
+17ft-86ft

Overall

20727

Females

8358

F50-54

8358

35K→23M

21.8 - 23.0 mi

Top 89%
×5stories
+23ft-63ft

Overall

23820

Females

10014

F50-54

10014

23M→24M

23.0 - 24.0 mi

Top 98%
×6stories
+12ft-82ft

Overall

26077

Females

11203

F50-54

11203

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

20255

Females

8199

F50-54

8199

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

19580

Females

7845

F50-54

7845

25.2M→Finish

25.2 - 26.2 mi

Top 76%
×2stories
+22ft-21ft

Overall

20219

Females

8136

F50-54

8136

Passing Analysis

Category:
Athletes Passed
1219
Passed By
1773
Net Change
-554
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21754
5K → 10K128439-311#21754#22065
10K → 15K118271-153#22065#22218
15K → 20K26235+227#22218#21991
20K → Half2922+7#21991#21984
Half → 25K16447+117#21984#21867
25K → 30K165108+57#21867#21810
30K → 20M16316-300#21810#22110
20M → 21M7934+45#22110#22065
21M → 35K498+41#22065#22024
35K → 23M21139-118#22024#22142
23M → 24M4347-343#22142#22485
24M → 40K743+71#22485#22414
40K → 25.2M451+44#22414#22370
25.2M → Finish653+62#22370#22308
TOTALS12191773-554
📊

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